a 50.0kg bicyclist on a 10.0kg bicycle speeds up from a 5.00m/s to 10.0m/s

Answers

Answer 1

Answer:

The total kinetic energy before accelerating = 750 JThe total kinetic energy after accelerating = 3,000 JTotal work done = 2,250 J

Explanation:

Given:

Mass of bicyclist = 50 kg

Mass of bicycle = 10 kg

Initial velocity (u) = 5 m/s

Final velocity (v) = 10 m/s

Find:

(a) What was the total kinetic energy before accelerating = ?

(b) What was the total kinetic energy after accelerating = ?

(c) How much work was done to increase the kinetic energy of the bicyclist = ?

Computation:

Total mass (M) = 50 kg + 10 kg = 60 kg

1. The total kinetic energy before accelerating = 1/2[Mu²]

The total kinetic energy before accelerating = 0.5[(60)(5)²]

The total kinetic energy before accelerating = 750 J

2. The total kinetic energy after accelerating = 1/2[Mv²]

The total kinetic energy after accelerating = 0.5[(60)(10)²]

The total kinetic energy after accelerating = 3,000 J

3. Total work done = Δ K.E

Total work done = 3,000 J - 750 J

Total work done = 2,250 J


Related Questions

The mass of an object is 50 kg. If its weight is 600N on a certain planet. Calculate the
gravitational field strength of the planet.,

Answers

Answer: The answer is 700kg

Explanation:

The velocity and acceleration of a body are 90km/hr and 2m/s^2 respectively. find the distance travelled by it in half minute.

Answers

Answer:

1,650 meters

Explanation:

Start by converting the velocity to m/s. There are 3600 seconds in a minute and 1000 meters in a kilometer, so 90km/hr=25m/s. Half a minute is 30 seconds, so:

[tex]d=v_ot+\dfrac{1}{2}at^2 \\\\d=(25)(30)+\dfrac{1}{2}(2)(30)^2 \\\\d=750+900=1650m[/tex]

Hope this helps!

plzz help! i need it now!!!!
be 100% sure of the answer plzzz

Answers

The answer is friction


The output work is always less than the input work because some of the input work is used to overcome friction

Answer:

Equal effort force

Explanation:

A class 1 lever has the support between the load and the effort hence the load tilts the plain at one end containing the support we would require an effort equal and opposite to the load to ensure movement .

What is a resistor? A. a light bulb B.a switch C. a battery

Answers

Answer:

A resistor is a battery

Answer:

The answer is A

Explanation:

A resistor is a light bulb because it is the flow of an electric current in an electric circuit.

what is mercury barometer​

Answers

A mercury barometer is a device that is used to measure atmospheric pressure at a location. :)

how much energy (in kW-h) does a 900 Watt stove use in a week if it is used for 1.5 hours each day?

Answers

Answer:

9.45 kWh

Explanation:

Energy = Power × time

E = 900 W × (1.5 h/day × 7 day)

E = 9450 Wh

E = 9.45 kWh

1. Calculate the total binding energy of 12

6 C.

Answer in units of MeV.



2. Calculate the average binding energy per nucleon of 24

12Mg.

Answer in units of MeV/nucleon.



3. Calculate the average binding energy per nucleon of 85

37Rb.

Answer in units of MeV/nucleon.



4. Find the binding energy per nucleon of 238

92U.

Answer in units of MeV/nucleon.



5. Calculate the total binding energy of 20

10Ne.

Answer in units of MeV.



6. Calculate the total binding energy of 40

20Ca.

Answer in units of MeV.

Answers

Answer:

1. B = 79.12 MeV

2. B = -4.39 MeV/nucleon

3. B = 2.40 MeV/nucleon

4. B = 7.48 MeV/nucleon

5. B = -18.72 MeV

6. B = 225.23 MeV            

Explanation:

The binding energy can be calculated using the followng equation:

[tex] B = (Zm_{p} + Nm_{n} - M)*931 MeV/C^{2} [/tex]

Where:

Z: is the number of protons

[tex]m_{p}[/tex]: is the proton's mass = 1.00730 u

N: is the number of neutrons

[tex]m_{n}[/tex]: is the neutron's mass = 1.00869 u

M: is the mass of the nucleus

1. The total binding energy of [tex]^{12}_{6}C[/tex] is:

[tex] B = (Zm_{p} + Nm_{n} - M)*931.49 MeV/u [/tex]

[tex] B = (6*1.00730 + 6*1.00869 - 12.011)*931.49 MeV/u = 79.12 MeV [/tex]

 

2. The average binding energy per nucleon of [tex]^{24}_{12}Mg[/tex] is:

[tex] B = \frac{(Zm_{p} + Nm_{n} - M)}{A}*931.49 MeV/u [/tex]

Where: A = Z + N

[tex] B = \frac{(12*1.00730 + 12*1.00869 - 24.305)}{(12 + 12)}*931.49 MeV/u = -4.39 MeV/nucleon [/tex]                                  

   

3. The average binding energy per nucleon of [tex]^{85}_{37}Rb[/tex] is:

[tex] B = \frac{(Zm_{p} + Nm_{n} - M)}{A}*931.49 MeV/u [/tex]

[tex] B = \frac{(37*1.00730 + 48*1.00869 - 85.468)}{85}*931.49 MeV/u = 2.40 MeV/nucleon [/tex]

     

4. The binding energy per nucleon of [tex]^{238}_{92}U[/tex] is:

[tex] B = \frac{(92*1.00730 + 146*1.00869 - 238.03)}{238}*931.49 MeV/u = 7.48 MeV/nucleon [/tex]

 

5. The total binding energy of [tex]^{20}_{10}Ne[/tex] is:

[tex] B = (Zm_{p} + Nm_{n} - M)*931.49 MeV/u [/tex]

[tex] B = (10*1.00730 + 10*1.00869 - 20.180)*931.49 MeV/u = -18.72 MeV [/tex]

6. The total binding energy of [tex]^{40}_{20}Ca[/tex] is:

[tex] B = (Zm_{p} + Nm_{n} - M)*931.49 MeV/u [/tex]

[tex] B = (20*1.00730 + 20*1.00869 - 40.078)*931.49 MeV/u = 225.23 MeV [/tex]

I hope it helps you!

A scanning tunneling microscope is used to measure small changes in height of a surface by detecting changes in the tunneling current between the tip and the surface. The current is proportional to the tunneling coefficient (ie. I = const * T) which follows the general equation for tunneling through a square well , with C dependent on the molecule and L is the distance. The transmission coefficient at one point is T = 0.01, what is the relative current if the distance is increased from L to 5L? We are interested in I(5L)/I(L). (Note: there may be more information provided than you need to solve the problem.)

Answers

Answer:

[tex]\mathbf{\dfrac{I(5l)}{I(l) } =10^{-8}}[/tex]

Explanation:

We are being told that the current is proportional to the tunneling coefficient[tex]I(l) = I_0 e^{-2kl}[/tex] ;

where l = distance between the tip and the surface.

Let      [tex]I(l) = I_0 e^{-2kl}[/tex]        ------------  equation (1)

and     [tex]I(5l) = I_0 e^{-2k(5l)}[/tex]   ------------ equation (2)

Dividing equation (2) by (1); we have :

[tex]\dfrac{I(5l)}{I(l) } = \dfrac{I_0 e^{-2k(5l)}}{ I_0 e^{-2kl}}[/tex]

[tex]\dfrac{I(5l)}{I(l) } =e^{-2k(5-1)l}[/tex]

[tex]\dfrac{I(5l)}{I(l) } =(e^{-2kl})^4[/tex]

where ;

[tex](e^{-2kl})[/tex] represents the transmission coefficient T = 0.01

Thus; replacing the value for 0.01;we have;

[tex]\dfrac{I(5l)}{I(l) } =0.01^4[/tex]

[tex]\mathbf{\dfrac{I(5l)}{I(l) } =10^{-8}}[/tex]

List two things you should not do when encountering a funeral procession?

Answers

party and being happy..........

the cylinder of gravity of cylinder is where

Answers

Explanation:

In uniform gravity it is the same as the centre of mass. For regular shaped bodies it lies at the centre of the that particular body. Hence for a cylinder centre of gravity lies at the midpoint of the axis of the cylinder.

Explanation:

We developed a spherical harmonic series that represents the gravitational potential and its gravity field due to a buried right vertical cylinder. This series can be used at far- and intermediate-regions, and is fast and accurate, using only a few terms. We compared the values of the fields acquired by this new spherical harmonic series, with ones computed by direct numerical integrations, using a fine-mesh structure for a vertical cylinder. Results of the calculations are shown and performances of the two different methods are compared. Faithfulness of the spherical harmonic series is tested with an inversion example.

At which point does the pendulum have the highest velocity

Answers

The pendulum has the greatest speed as it passes through the lowest position, straight down, where it was hanging limply before you started it swinging.

Which is an example of transforming potential energy to kinetic energy? Select two options
changing thermal energy to electrical energy
changing chemical energy to thermal energy
changing nuclear energy to radiant energy
changing radiant energy to electrical energy
changing mechanical energy to chemical energ

Answers

Answer :

.changing chemical energy to thermal energy

.changing nuclear energy to radiant energy

Explanation :

Hope it helps you mate ))

Answer:

.changing chemical energy to thermal energy

.changing nuclear energy to radiant energy

Explanation:

Heat is supplied to convert 1.26 kg of water at 100°C to steam at 100°C? Latent heat of vaporization of water is
2.26 x 106 J/kg.
a
What is latent heat, and how does it affect the temperature of a substance?

Answers

Given that,

Mass of water = 1.26 kg

Latent heat of vaporization of water [tex]L=2.26\times10^{6}\ J/kg[/tex]

We need to calculate the latent heat

Using formula of latent heat

[tex]Q=mL[/tex]

Where, Q = energy

m = mass

L = latent heat of vaporization

Put the value into the formula

[tex]Q=1.26\times2.26\times10^{6}[/tex]

[tex]Q=2847600\ J[/tex]

[tex]Q=2.84\times10^{6}\ J[/tex]

The temperature changes liquid to steam.

So, The temperature will be increases.

Hence, The latent heat is [tex]2.84\times10^{6}\ J[/tex] and temperature increases.

Answer:

latent heat = 2.84 x 10^6

and the temperature increase

Explanation:

please answer this question first one to answer the right answer will be marked brainiest

Answers

Answer:  Force per unit area. Explanation: P = 25/20. P = 5/4 Pascal or 1.25 Pascal

Explanation: is this what you were looking for

A wire having resistance 20 ohm is bent to make a closed square.What is the resistance across the diagonal of square?

Answers

Answer:

5 Ω

Explanation:

When it is bent into a square, each side of the square will get 5 Ω resistance. As considered diagonally ,path of the wire between to diagonal points is the two sides of the square (that is half the length of the wire connected in parallel position). Which gives 10 ohm parallel to 10 ohm wire. So it finally read as 5 Ω wire

A curium-242 (Z= 96) can be produced by positive-ion bombardment when an alpha particle collides with which of the following nuclei? Note: A neutron is also a product of this bombardment, in addition to the curium-242.
A. Pu -239
B. U -239
C. Am-241
D. Cf-249
E. Pu-241

Answers

Answer:

A. Pu -239

Explanation:

An isotope is an element with the same atomic number but different mass number. most isotope are unstable, having short half life.

Curium-242 is an isotope produced when Plutonium 239 is bombarded by an alpha particle. This reaction between Plutonium 239 and alpha particle gives curium-242, neutron and a high amount of energy as the products.

Curium oxidizes easily, and it is a dangerous metal which can cause cancer initiation when absorbed by biological materials e.g bones or tissue.

Question 1 of 25
2 Points
What is the kinetic energy of a 5-kg cat chasing a mouse across the yard at 2
m/s?
A. 98 J
B. 10 J
C. 2J
D. 20 J
SUBMIT

Answers

Explanation:

K = 5kg[tex](2 m/s)^{2}[/tex]/2 = 10 J

A cork weigh 2.5 gf in air. When tied to a sinker , the total weight is 20 gf in water. If the sinker alone weighs 25gf in water, find the density of the cork

Answers

Answer:

0.333

Explanation:

Weight of the sinker in water = 25gf

Weight of cork in air and sinker in water = 25gf + 2.5gf

= 27.5gf

Weight of the cork and sinker in water = 20gf

Loss of weight of cork in water = 27.5- 20 = 7.5gf

Rd of cork = weight of cork in air/ loss of weight of cork in water

= 2.5/7.5

= 1/3

= 0.333

Hence the Relative density of the cork is 0.333

In a 30cm by 25cm rectangle, a quadrant of a circle of radius 7cm has been cut away from each corner. What is the perimeter of the part left? ​

Answers

Answer: 98cm

Explanation:

Dimension of rectangle = 30cm by 25cm

Length(l) = 30cm

Width(w) = 25cm

Perimeter of a rectangle = 2(l + w)

Quadrant of circle cut away of each side of the rectangle :

Radius = 7 cm =

That is, the dimension of the triangle reduces by 2 * 7 = 14cm

New length = 30 - 14 = 16cm

New width = 25 - 14 = 11cm

The four corners =( 4 × 2πr ) / 4

2πr = 2 × 22/7 × 7 = 44cm

Perimeter = 2(16cm + 11cm)

= 2(27cm)

Perimeter = 54cm + 44 = 98cm

Calcula el trabajo que realiza la fuerza de fregamiento sobre un cuerpo de 13kg que es desplaza una distáncia de 46 m si el coeficiente de fregamiento entre las superficies es de 0,45

Answers

Answer:

Los datos que tienes son:

m = 13 kg

d = 46 m

∪ = 0,45

g = 9,8 m/s²

Fr = ? 

w = ? 

Lo primero que haremos que calcular Fr

Fr = ∪mg

Fr = (0,45) (13 kg) (9,8 m/s²)

Fr = 57,33 N

Calculamos el trabajo realizado.

w = Fd

w = (57,33 N) (46 m)

w = 2637,18 Joules

Respuesta.

El trabajo realizado es 2637,18 Joules

Explanation:

A tuning fork is vibrating the air around it. What best describes the waves produced by the tuning fork?

Answers

Answer:

The water particles move in the same direction as the vibrating source of the sound wave. ... What best describes the waves produced by the tuning fork? mechanical, because the vibrating tuning fork makes air molecules around it vibrate. A wave is produced in a Slinky as shown.

Explanation:

Answer:

mechanical, because the vibrating tuning fork makes air molecules around it vibrate

Explanation:

Jake, who weighs 680 newtons, climbs a 6-meter ladder in 8 seconds. What was Jake's power?

Answers

I feel like it would be 536

This is a physics question about acceleration, I'm a Sophmore btw

"Determine the amount of time it takes for a car to accelerate forward at a rate of 7.00 m/s^2 if it starts from rest and reaches a final speed of 30.0 m/s."

I was having trouble figuring out the time if anyone can help that'd be lovely!!

Answers

Answer:

4.29 s

Explanation:

Given:

v₀ = 0 m/s

v = 30.0 m/s

a = 7.00 m/s²

Find: t

v = at + v₀

30.0 m/s = (7.00 m/s²) t + 0 m/s

t = 4.29 s

A car has a kinetic energy of 1.9 × 103 joules. If the velocity of the car is decreased by half, what is its kinetic energy?

Answers

Answer:

475 J

Explanation:

Kinetic energy is calculated by one half of the product of mass and velocity squared or expressed as:

KE = 1/2 (mv²)

We calculate as follows:

KE1 = 1/2 (mv²) = 1.9 * 10^3 joules

KE2 = 1/2 (m(v/2)²) = 1/2 (mv²/4)

KE2 =  1.9 * 10^3 joules / 4 = 475 J

Which quantity Has the same unit as potential difference

Answers

Answer:

Voltage.

Explanation:

Explain why a Merry-Go-Round and a Ferris Wheel have a constant acceleration when they are moving.
Answer must be at least two sentences and contain words such as velocity and acceleration.

Answers

Explanation:What is centripetal acceleration?

Can an object accelerate if it's moving with constant speed? Yup! Many people find this counter-intuitive at first because they forget that changes in the direction of motion of an object—even if the object is maintaining a constant speed—still count as acceleration.

Acceleration is a change in velocity, either in its magnitude—i.e., speed—or in its direction, or both. In uniform circular motion, the direction of the velocity changes constantly, so there is always an associated acceleration, even though the speed might be constant. You experience this acceleration yourself when you turn a corner in your car—if you hold the wheel steady during a turn and move at constant speed, you are in uniform circular motion. What you notice is a sideways acceleration because you and the car are changing direction. The sharper the curve and the greater your speed, the more noticeable this acceleration will become. In this section we'll examine the direction and magnitude of that acceleration.

The figure below shows an object moving in a circular path at constant speed. The direction of the instantaneous velocity is shown at two points along the path. Acceleration is in the direction of the change in velocity, which points directly toward the center of rotation—the center of the circular path. This direction is shown with the vector diagram in the figure. We call the acceleration of an object moving in uniform circular motion—resulting from a net external force—the centripetal acceleration

a

c

a

c

a, start subscript, c, end subscript; centripetal means “toward the center” or “center seeking”.


Diagram shows the heating
curve for 0.5 kg heated by a
100 W immersion heater. What
is the specific heat capacity of
the liquid?

Answers

Answer: 35

Explanation:

Given the following :

M = 0.5 kg

Power of heater = 100W

From the graph ;

Time (t) = 7seconds

Change in temperature(Dt) = t2 - t1

Where t2 = 70°C, t1 = 30°C

Dt = (70 - 30)°C = 40°C

Recall Q = iVt

IV = power

Q = mcDt

c = specific heat capacity of liquid

mcDt = ivt

mcDt = power × t

0.5 × c × 40°C = 100 × 7

20°C × c = 700 J

c = 700 J/ 20°C

c = 35 J / kg°C

If there are a boys pulling a rubber
with the same amount of force what will happen?

Answers

Answer:

The rubber will expand to its maximum and then tear in the middle.

Explanation:

Answer:

Hey!

Well if they continue to pull the rubber band, it would eventually rip apart right in the middle as the force could not be contained by the elastic fibres and had reached its maximum extension!

Explanation:

HOPE THIS HELPS!!

i reallllly need someone to answer this quick. it's fine if you can't though

Answers

Answer:

The correct order of answers goes:

[tex]\left[\begin{array}{ccc}Ionic\\Electronegativity\\Metallic\\Cation\end{array}\right][/tex]

Explanation:

Ionic - Ionic bonds are formed between a metal and a nonmetal (typically). Nonmetals are typically more electronegative elements because they are seeking to gain electrons to achieve atomic stability while metals want to give up electrons to those elements to become atomically stable. Therefore, the nonmetals are much more electronegative in comparison to the metals.

Electronegativity - Electronegativity is used mathematically to predict the type of bond that will occur between elements. The larger electronegativity has the smaller electronegativity subtracted from it to give us a number that we then apply to ranges within a table and try to decipher what kind of bond will be formed.

Metallic - This plays into both explanations already given. Metallic bonds will form between metals, meaning their electronegativities will be much lower. Higher differences between electronegativities (anything above 1.7) is considered ionic, while anything from 0.1 to 1.69 is considered covalent (these split to make polar and nonpolar covalence).

Cation - Cation is the term for a positively charged ion. It comes from cathode (a scientist completed an experiment with the cathode ray tube where they accelerated positively charged particles throughout it).

Is a 5kg ball is rolling to the right and has a velocity of 4 m/s what is the momentum of the ball

Answers

Answer:

∆p = 20 kg * m/s

Explanation:

The change in momentum is the mass of the body multiplied by the change in its velocity.

In formula form ∆p = m * ( ∆v ).

with m = 5 kg and ∆v = 4 m/s

∆p = 5 kg * 4 m/s

∆p = 20 kg * m/s

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Suppose A and B are independent events. If P(A) = 0.3 and P(B) = 0.45, what isP(A n B)? Which of these students are most likely in need of professional mental health services? Check all that apply.Melanie is struggling to control angry outbursts and rage toward family and strangers.Alonso is having trouble concentrating on his school work while he waits to find out how his father's surgery went.Darius is less interested in spending time with friends and has stopped participating in activities he once enjoyed.Cody began dieting to make weight for wrestling, but now he struggles with his body image and is continuing toeat less and less.van is feeling nervous and anxious before a mid-term exam at school after she recently received a C on anessay The value of a painting can be predicted by the expression 120(1.08)t, where t is the number of years since 2014.What does the value 120 represent?1. the predicted value of the painting in 20142. the predicted change in the value of the painting each year3. the predicted percent change in the value of the painting each year4. the number of years for which the value of the painting is predicted to continue changing What was the great migration? And what was the economic impact on the north? 2.How did growth in Florida impact Native Americans ATP molecules, which are used for energy by cells, are built during all three stages of cellular respiration. Which stage of cellular respiration generates the most ATP molecules? (1 point) The Krebs cycle Glycolysis The electron transport chain Fermentation Solve the following equation for x.7x-3y=-13 Two number cubes are rolled for two separate events:Event A is the event that the sum of numbers on both cubes is less than 10.Event B is the event that the sum of numbers on both cubes is a multiple of 3.Complete the conditional probability formula for event B given that event A occurs first by writing A and B in the blanks:P ( _a0 | _a1) = P ( _a2 _ a3) ___________ P ( _a4) triangle jkl is similar to triangle tuv. find the missing side length of triangle tuv. JK=10in JL=8in KL=13in TU=7.5 UV=9.75 find TV Josy multiplied the number of quarts bymultiplied the number of quarts byThere arecups in each quart. She should have3 x=so there arecups in the pitcher.Joseph * the number of 2 quarts Selected accounts from the ledger of Garrison Company appear below. For each account, indicate the following: a. In the first column at the right, indicate the nature of each account, using the following abbreviations: Asset - A Revenue - R Liability - L Expense - E None of the above - N b. In the second column, indicate the increase side of each account by inserting "Dr." for Debit or "Cr." for Credit. Account Type of Account Increase Side (1) Supplies (2) Fees Earned (3) Retained Earnings (4) Accounts Payable (5) Salaries Expense (6) Common stock (7) Accounts Receivable (8) Equipment (9) Notes Payable How It Feels to Be Colored Me, which of these inferences about the narrators relationship with white culture is best supported by the essay? Question 10 options: a) She is suspicious of white culture. b) She wants desperately to be a part of the white mainstream. c) She loved white culture as a child, but came to loathe it. d) She is not scared of or enthralled by white culture. How is the trade in Canada? Let f(x) = ................. Problem 15-10 The term structure for zero-coupon bonds is currently: Maturity (Years) YTM (%) 1 4.1 % 2 5.1 3 6.1 Next year at this time, you expect it to be: Maturity (Years) YTM (%) 1 5.1 % 2 6.1 3 7.1 a. What do you expect the rate of return to be over the coming year on a 3-year zero-coupon bond? (Round your answer to 1 decimal place.) b-1. Under the expectations theory, what yields to maturity does the market expect to observe on 1- and 2-year zeros at the end of the year? (Round your answers to 2 decimal places.) b-2. Is the market's expectation of the return on the 3-year bond greater or less than yours? Greater Less rev: 09_14_2018_QC_CS-134332 What must happen for an ionic bond to be created between two elements? PLEASE SOLVE THE FOLLOWING PROBLEM! IT'S SUPER EASY! |2x3| =5 The following question is based on your reading of Life is a Dream."Why does Clotaldo protect Rosaura?He has pity on her because she is a woman.b. He recognizes the sword she carries.She pleads for her life.He thinks that she is his long-lost son.d. HistoryIn what time period did the medicine improve the most What advice would you offer an Advisor, Laggard, or Mechanic in their quest to become an Orchestrator? Are there any other dimensions you would choose to classify CIOs by other than "Leadership Capability" and "Decision-Making Authority"? Why?