The speed of the car when you hit the police car is 26.154 m/s.
The speed of the car's v = 110km/h = 30.56 m/s
The total time travel will also include the reaction time:
t = 2 + 0.4 = 2.4 s
For police,
The acceleration, a = - 5 m/s²
The distance traveled is:
[tex]S(p) = vt + (\frac{1}{2} ) \times at^{2}[/tex]
[tex]S(p) = 30.56 \times 2.4 + \frac{1}{2} \times (-5) \times (-2.4)^{2}[/tex]
S(p) = 58.93 m
Now, the original gap between the car was 25 m.
Therefore, the final gap = (25 − 73.33 + 58.93) m = 10.6 m
As a result, let's say that at time t₀, the distance between the cars is 10.6 meters.
The speed of the police car at t₀ will be:
v(p) = (30.56 − 5 × 2.4) = 18.56m/s.
Now, the collision occurs at a time t when S = S(p)
We pick your position's coordinates to be S = 0 and the police car's position to be S(p) = 10.6m at time t₀ .
Therefore,
[tex]S(p) - 10.6 = 18.56(t - t_{0}) - \frac{1}{2} \times (5) \times (t - t_{0})^{2}[/tex]
S(p) = 10.6 + 18.56t − 2.5t²
And,
[tex]S = 30.56 (t - t_{0}) - \frac{1}{2} \times (5) \times (t - t_{0})^{2}[/tex]
When the distances are equal.
S = S(p)
30.56 (t - t₀) - (1/2)(5)(t - t₀)² = 10.6 + 18.56t − 2.5t²
t = 0.883 sec
So, the speed of your car during the collision will be:
v = 30.56 - 5(0.883) = 26.154 m/s
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The complete is mentioned below:
You are arguing over a cell phone while trailing an unmarked police car by 25m; both your car and the police car are traveling at 110km/h. Your argument diverts your attention from the police car for 2.0s (long enough for you to look at the phone and yell, “I won’t do that!”). At the beginning of that 2.0s, the police officer begins braking suddenly at 5.0m/s². What is the separation between the two cars when your attention finally returns? Suppose that you take another 0.40s to realize your danger and begin braking. If you too brake at 5.0m/s², what is your speed when you hit the police car?
Hey everyone,
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stop whatever you are doing
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look in it
look at your face
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look at your eyes
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I hope you realize
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Answer:
oooh thanks
Explanation:
..................
Answer:
awwww thx you are to :)
Explanation:
The peregrine falcon can reach speeds up to 107 m/s during a dive, how much time does it take the falcon to reach prey that is 1500 meters away?
Science: due in 5 minutes plz help me!
just in 2-5 sentences is ok Thank you!!!
Answer:
Explanation:
When the sun rises every morning, it brings light and heat into earth. Plants need energy to live, so they convert the sun's light into chemical energy. (photosynthesis). Then animals eat those plants. Without the sun, we would not have any food, and very little sources of light.
mercury shows fester increase in temperature than water on heating
Answer:
Mercury shows faster increase in temperature than water on heating because the mercury has less specific heat capacity than water.
The specific heat capacity is defined as the amount of heat to required by a mass of a material to make a unit change in its temperature. Mercury has less specific heat capacity and shows immediate changes in the temperature. Because of this mercury is used in thermometers and not water.
the Heat required to raise the temp. of 20 g water from 25 C to 36 C
A 6.8 kg cannon ball leaves a canon with a speed of 188 m/s. Find the average net force applied to the ball if the cannon muzzle is 4.2 m long.
i want the answer with the steps
Answer:
its not long dummy, its your imagination
Explanation:
The reason that objects tend to rest in our daily lives is because there are
unbalanced forces acting on them.
true or false?
Answer:
True
Explanation:
An object at rest will stay at rest unless acted on by an unbalanced force.
Gravity accelerates any object falling at 9.8 m/s2. What is the force that will be applied to the ground if an 88 kg box falls from the top of a shelf to the ground?
Answer:
The force is of the weight 862,4 Newtons.
Explanation:
We have the formula:
w = m * g
Data:
w = weight = ¿?
m = mass = 88 kg
g = gravity = 9,8 m/s
Replacing according formula:
w = 88 kg * 9,8 m/s
Resolving:
w = 862,4 N
which of the following is not an electromagnet device
Answer:
[tex]\textbf {Engine}[/tex]
Explanation:
Electric motor in cars is an example of electromagnetic device.
Determine the kinetic energy of a 1000 kg roller coaster car that is moving with speed of 40.0 m/s
Answer:
KE=800,000
Explanation:
The formula for kinetic energy is KE=1/2mv^2 or Kinetic Energy= 0.5*mass*velocity^2
so 1000 is the mass and 40 is the velocity
KE=0.5*1000*40^2
KE=0.5*1,000*1,600
KE=800,000 Joules
Please help me I need it
Answer:
Parallel circuits :)
An over-caffeinated student stands on a table which weighs 600 newtons. The student has a mass of 50 kg. What is the weight of the student? What is the weight of the student AND the table combined? Now, what is the TOTAL normal force on the table by the floor?
Answer:50kg
Explanation:
De manera individual subraya la respuesta correcta: A) El Método Científico de la física experimental y su búsqueda de respuestas tiene un principio básico que es: a. La ciencia. b. Una pregunta. c. La objetividad. d. El conocimiento.
Answer:
a. La ciencia.
Explicación:
El método científico de la física experimental y su búsqueda de respuestas tiene un principio básico que es la ciencia. La ciencia es la aplicación del conocimiento del mundo natural y social siguiendo una metodología sistemática basada en evidencias. Sin evidencias no hay aceptación de la observación ni se debe hacer teoría porque la evidencia es el principal criterio para aceptar o rechazar una hipótesis.
plz help will give brainlest! if you cant help, well, merry christmas!
Fossils are found in:
sedimentary rock
metamorphic rock
sedimentary and metamorphic rock
sedimentary and igneous rock
most fossils are found in sedimentary rocks
Answer:
Sedimentary rock.
Explanation:
How can you drop two eggs the fewest amount of times, without them breaking?
Answer:
Both eggs are identical. The aim is to find out the highest floor from which an egg will not break when dropped out of a window from that floor. If an egg is dropped and does not break, it is undamaged and can be dropped again. However, once an egg is broken, that's it for that egg.
A porg (bird like creature) has an acceleration of 1.2 m/sec/sec, to the right. The animal is moving at 0.8 m/sec to the
5.0 seconds later, it is moving at 6.8 m/sec to the right. Calculate the porg's average speed.
The Average Speed of the Porg is 3.8 m/s.
Let us say that the initial speed is u which is equal to 0.8 m/s and the final speed of the porg to be v which is equal to 6.8 m/s.
The total time period of the motion is given to us as 5 seconds. Let us represent the acceleration of the body as a, acceleration of the body given is 1.2m/s².
Here since the direction of the motion is not changing and the acceleration is constant, we can use the kinematic equations of motion.
Let say that the body covers distance d in 5 seconds.
To find the distance covered by the body we will use the equation,
v²-u²=2da
Putting all the values,
(6.8)²-(0.8)²²=2(1.2)d
46.24 - 0.64 = 2.4d
45.6 = 2.4d
d = 19m
The distance covered by the porg is 19 meters.
Now let say Average Speed is S.
As we know, the average speed of the body (S) = Total distance covered(d)/total time taken(t)
S = d/t
Average speed = 19/5
Average sped = 3.8 m/s.
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Jennifer wears a black shirt on a sunny summer day. After spending one hour outdoors, Jennifer notices that the shirt is much warmer than it was originally. What role did sunlight play in warming the shirt
Explanation:
Black or Dark color clothes are good absorbers of heat. The heat from the sun is absorbed by the black shirt, thus making the shirt warmer. The sunlight here is source of heat. The amount of heat absorbed can be calculated according to the stephan's law.
two skateboarders of mass 50 kg and 60 kg push each other with force 70N.what is the acceleration of each skaters.step by step.
Answer:
f=ma
f=70N
m1=50kg
m2= 60kg
a1= f/m
a1= 70/50
a1= 1.4N/kg
a2= 70/60
a2=1.17N/kg
6. What force causes the convection cell to turn down at point C?
your physics class is conducting an experiment on the energy exchange between colliding objects. you and your classmates have identical materials and are experimenting with identical conditions. you perform three trials, and your data is different in each trial. you compare results with your peers and find that everyone has different data.
The scientific experiment is limited due to common sources of errors.
The use of unreliable measurement equipment is one of the causes of incorrect data . Instrumental, environmental, procedural, and human errors are frequent causes. Depending on how they impact the outcomes, each of these mistakes can either be random or systematic. Additionally, mistakes might be made when capturing observations or data. In doing an experiment on the exchange of energy between colliding objects, something unexpected happened.
In this experiment, the observation technique or the equipment used to record the data are wrong, which gives us false findings, leading us to the conclusion that the scientific experiment is constrained by the usage of the same observation technique and instrument.
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What are Prevailing Westerlies? a Calm area with rising air b Wind blowing West to East away from horse latitudes c Wind blowing East to west away from horse latitudes d Air being blown away from the poles
Answer:
b Wind blowing West to East away from horse latitudes
Explanation: prevailing Westerlies are winds which blows away from the horse latitudes, this type of wind blow towards the poles between latitude 30 degrees to latitude 60degrees.
Prevailing Westerlies are known to be strongest in the winter months in the and weakest in the summer months
They are also very strong when the pressures are low over the poles and also very weak when the pressures are high over the poles.
Sheila uses a 45N force on her bowling ball across a 15m lane. What work did she do on the bowling ball? Show your work.
Answer:
675J
Explanation:
Given parameters:
Force = 45N
Distance = 15m
Unknown:
Work done by Sheila = ?
Solution:
Work done by a body is the amount of force applied to make a body move through a distance;
Work done = Force x distance
Now;
Work done = 45 x 15 = 675J
a 0.240 kg glider moving with a velocity of 0.600 m/s collides head-on with a 0.260 kg glider moving along the same line in the opposite direction with a velocity of 0.200 m/s. the collision is perfectly inelastic. the final velocity of the combined gliders is m/s. group of answer choices 0.0484 0.563 -0.392 none of these 0.184
the final velocity of the combined gliders is -0.392m/s.
perfectly inelastic collision - It is the process of striking one object to another without conserving the kinetic energy of two object.
m₁ = 0.240 (mass of first glider)
v₁ = - 0.6m/s ( velocity of first glider)
m₂ =0.260 (mass of 2nd glider)
v₂ = 0.2 m/s ( velocity of 2nd glider)
[tex]v_{f}[/tex] = ?
for perfectly inelastic collision
m₁v₁ + m₂v₂ = (m₁+ m₂)[tex]v_{f}[/tex]
[tex]v_{f}[/tex] = m₁v₁ + m₂v₂ /(m₁+ m₂)
[tex]v_{f}[/tex] = [tex]\frac{0.240*(-0.6+0.260*0.2)}{0.240+ 0.260}[/tex]
[tex]v_{f}[/tex] = -0.392 m/s
the final velocity of the combined gliders is -0.392m/s.
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Fill in the missing word. Nuclear fusion is difficult to achieve because at low temperatures and pressures
the positively charged nuclei of deuterium and tritium electrostatically
each other.
Answer:
Nuclear fusion is difficult to achieve because at low temperatures and pressures the positively charged nuclei of deuterium and tritium electrostatically each other is explained below in complete details.
Explanation:
For nuclear fusion to happen, very eminent temperatures are needed to succeed the opposing force between the positively energized nuclei of a specific isotope. Fusion doesn't release dangerous toxins like co2 or other greenhouse gases into the environment. Its significant by-product is helium: an inactive, non-toxic gas. No long-lasting radioactive ruin: Nuclear fusion reactors generate no high action, long-lived nuclear ruin.
Answer:
repel
Explanation:
its called electrostatic repulsion
a 50 kg block is pulled from rest by a force of 1000 n at 37° across a horizontal rough surface over a distance of 5.6 m. the coefficient of kinetic friction between the block and the surface is 0.5
The work done by F is 4472.4J.The work done by the normal force is 0J.The work done by the gravitational force is 0J.The friction force is ineffective as the object is not in contact with surface.
What is work done?The energy that is transmitted to or from an object when a force is applied along a displacement is referred to as work in physics.In its simplest form, it is usually explained as the result of force and displacement. Positive work is the term for the component of a force that moves the point of application when it is applied. A force is said to do negative work if, at the point of application, one of its components points in the opposite direction of the displacement. Work is a scalar quantity, hence it only has magnitude and no direction. Through work, energy is transported from one place or one form to another.
Calculations:
a)
d = distance travelled = 5.6 m
Work done by the applied force F is given as,
Wa = F d Cos\theta = (1000) (5.6) Cos37 = 4472.4 J
b)
Work done by the normal force Fn is given as,
Wn = Fn d Cos90 = Fn (5.6) Cos90 = 0 J
c)
Work done by the gravitational force "mg" is given as,
Wg = mg d Cos90 = mg (5.6) Cos90 = 0 J
d)
Using the equilibrium of force in vertical direction,
Fn + F Sin\theta = mg
Fn + 1000 Sin37 = 50 x 9.8
Fn = - 111.82 N
Frictional force will be ineffective since the object is not in touch with the surface and normal force is negative.
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you give a shopping cart a shove down the aisle. The cart is full of groceries and has a mass of 180.0kg. The cart accelerates at a rate of 3.5 m/s². How much force did you exret on the cart?
The amount of force exerted on a cart that is full of groceries of mass of 180.0kg is 630N.
How to calculate force?The force applied on an object can be calculated by multiplying the mass of the object by the acceleration as follows:
Force = mass × acceleration
According to this question, a cart is full of groceries and has a mass of 180.0kg. The force, if cart accelerates at a rate of 3.5 m/s², can be calculated as follows:
Force = 180kg × 3.5m/s²
Force = 630N
Therefore, the amount of force exerted on a cart that is full of groceries of mass of 180.0kg is 630N.
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If the total mechanical energy of the system is 100 J: Where does the pendulum have 100 J of kinetic energy? Where does the pendulum have 100 J of potential energy? (Label both points.)Where does the pendulum have 50 J of potential energy? (Label both
Answer:
See image and explanation
Explanation:
A simple pendulum consists of a string to which a bulb is attached and the string is tied to a support. The string swings from one end to the other as shown.
At the both ends, the energy of the pendulum is all potential. Hence we have 100J potential energy at both ends.
When the pendulum is in motion, the energy is all kinetic at the center of motion. Hence at that point, we have 100J kinetic energy.
In between both extremes the energy is both kinetic and potential as shown. The total energy is this a summation of the two.
Answer:
A simple pendulum consists of a string to which a bulb is attached and the string is tied to a support. The string swings from one end to the other as shown.
At the both ends, the energy of the pendulum is all potential. When the pendulum is in motion, the energy is all kinetic at the center of motion.
In between both extremes the energy is both kinetic and potential as shown. The total energy is this a summation of the two.
Consider (a) an electron (b) a photon, and (c) a proton, all moving in vacuum. Choose all correct answers for each question. (iii) Which carry energy?
Electron , photon and proton carry energy which is option (a) , (b) ,(c)
An electron is a solid negatively charged factor of an atom. Electrons exist outdoor of and surrounding the atom nucleus. Each electron includes one unit of bad charge (1.602 x 10-19 coulomb)A proton is a subatomic particle discovered withinside the nucleus of each atom. The particle has a advantageous electric charge, identical and contrary to that of the electron Photon is a subatomic particle, having strength and momentum however no mass or electric powered charge, this is the quantum unit of electromagnetic radiation, together with light.Photons are massless, but they have energy [tex]E = hv= \frac{hc}{\lambda}[/tex]
Here 'h' is called Planck's constant .
For electron and proton energy is given by
[tex]E=\frac{1}{2} \times mv^2[/tex]
Where m is the mass of the particle and v is the speed of particle .
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According to the scientific method which do you have to do before you can form a hypothesis?
According to the scientific method, you have to make observations and ask questions before you can form a hypothesis.
What is the scientific method?The scientific method is a series of steps or procedures which scientists follow in their process of discovery and explanation of the natural world or natural phenomena.
The scientific method consists of the following steps:
observation/ asking of questionsformulation of hypothesisdesigning of experimentstesting the hypothesisanalyzing the data from the experimentconclusionsfurther experimentstheory/lawIn conclusion, observations and questions are important before formulation of hypothesis.
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If two people lift identical stacks of books the same distance and one person does the job twice as fast, which of the following has doubled?
-power
-work output
-work input
-efficiency
Answer:
Power
Explanation:
Power is defined as the rate of doing work with reference to the time spent and the formula is force multiplied by velocity.
In this case, if two people lift identical stacks of books the same distance and one person does the job twice as fast, then it means the velocity in the case is doubled which will also lead to an increase in the Power .
PowerExplanation:
The formula for power is Work divided by time taken, so P=W/T.
That case, involved power, since one of the people did work twice as fast, but, it was the same amount of work each person did, for the same distance (not exact distance, but usually the same)