Answer:b
Explanation:
b
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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A slinky is traveling down the stairs, like in the video clip below. What is the total KINETIC ENERGY of the slinky at the bottom of the stairs (just before it stops moving) IF the Height of the stairs is 2 meters, the weight of the slinky is 4.41 Newtons, its spring constant is 0.84 N/m, and the distance the slinky is initially stretched (to get it going) is 0.25 meters??
Answer:
8.79 J
Explanation:
Given that a slinky is traveling down the stairs, like in the video clip below. What is the total KINETIC ENERGY of the slinky at the bottom of the stairs (just before it stops moving) IF the Height of the stairs is 2 meters, the weight of the slinky is 4.41 Newtons, its spring constant is 0.84 N/m, and the distance the slinky is initially stretched (to get it going) is 0.25 meters??
Total energy = mgh
Total energy = 4.41 × 2 = 8.82 J
Elastic potential energy = 1/2 × Ke^2
Elastic potential energy = 1/2 × 0.84 × 0.25^2
Elastic potential energy = 0.02625
Also,
Total energy = P.E + K.E
Substitute them into the formula above
8.82 = 0.02625 + K.E
K.E = 8.82 - 0.02625
K.E = 8.79375
K.E = 8.79 J
Therefore, the KINETIC ENERGY of the slinky at the bottom of the stairs is 8.79 Joules approximately
what is arthritis
ty for answers
Answer:
That is when your fingers are bent in a weird way and are distorted...
Explanation:
can you please help me
Answer: Don't worry I'm here to save u the answer is lithosphere (D) :D
Explanation: I have once done this question and got it right!
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.
Which of the following does not change the resistance of a wire?
1 the medium around a wire.
2 the temperature of a wire
3 the length of a wire
4 the thickness ofa wire
Answer:
1 the medium around the wire
Explanation:
pls mark brainliest it will be my first just pls
The medium surrounding a wire, like the insulating material, doesn't significantly impact resistance, as long as the wire's physical properties and temperature remain unchanged. The correct ans is 1. the medium around a wire.
The option that does not change the resistance of a wire is:
The medium around a wire.
Resistance in a wire is primarily determined by its physical properties, such as length, cross-sectional area (thickness), and temperature.
The temperature of a wire affects its resistance. As temperature increases, resistance also tends to increase.
The length of a wire affects resistance; longer wires offer higher resistance than shorter wires, assuming all other factors remain constant.
The thickness of a wire affects resistance; thicker wires (larger cross-sectional area) offer lower resistance than thinner wires.
The medium around a wire (Option 1) does not change the resistance of the wire. The resistance of a wire depends on its material, length, and cross-sectional area (thickness), which are constant properties of the wire. The medium or environment surrounding the wire, such as air or vacuum, does not directly affect its resistance.
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please help me swear will mark you brainiest
plzzzzzzzzzzzzzz
Moment of force = ………….. [1]
Distance between A and M = ………….. [2]
Answer:
(a) Picture Attached
(b)
i. 30 Nm
ii. Distance between A and M = 0.375 m
Explanation:
(a)
The other two forces are as follows:
1. The weight of wheel barrows acting downward at Point m
2. The Normal Reaction acting upward on wheel
These are show in the picture attached in solution.
(b)
i-
Now, for the moment of 20 N force about the point A:
[tex]Moment = Fd\\\\where,\\\\F = Force = 20\ N\\d = perpendicular\ distance between\ force\ and point\ A = 1.5\ m\\Therefore,\\Moment = (20\ N)(1.5\ m)[/tex]
Moment = 30 Nm
ii.
We take the sum of all moments about point A. Taking counter-clockwise direction as positive:
[tex](Weight)(AM) - Moment\ due\ to\ 20\ N Force = 0\\(80\ N)(AM) = (30\ Nm)\\AM = Distance\ between\ A\ and\ M = \frac{30\ Nm}{80\ N}\\\\[/tex]
Distance between A and M = 0.375 m
Please help ASAP! I will give the first answer brainliest!
Answer:
Sorry for being late. Hope this helps
Explanation:
What is the density of water?
HELPPPP PLEASE!!
Answer:
1g/cm³ or 1000kg/m³ at 4°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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6. What force causes the convection cell to turn down at point C?
the left hand should be positioned at 12 o'clock and the right hand should be positioned at 5 o'clock of the steering wheel. a. true b. false
It is false to say that the right hand should be at 5 o'clock and the left hand should be at 12 o'clock on the steering wheel.
Regardless of which way they're turning, the NHTSA advises drivers to use the areas of the steering wheel between "11 and 8 o'clock" with their left hand and "1 and 8 o'clock" with their right.
Injury prevention is aided by using the push/pull or hand-to-hand steering techniques.
Should you place your hands at 10 and 2?holding the wheel with one hand
Retract your hands. You presumably learned to hold onto the steering wheel with your hands around 10 and 2 o'clock. The National Highway Traffic Safety Administration (NHTSA) currently suggests that drivers place their hands at 9 and 3 o'clock.
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In order to change a 2.15 kg handcart's velocity from 1.2 m/s
east to 1.8 m/s east, what's the magnitude of the impulse that
should be applied to the handcart?
a
38.7 N-s
b 12.9 N-S
2.58 N-S
d 3.87 N-s
e
1.29 N.S
Answer: E 1.29 N•s
Explanation: math
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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A person is placed in a large, hollow, metallic sphere that is insulated from ground. (b) Explain what will happen if the person also has an initial charge whose sign is opposite that of the charge on the sphere.
When a person carrying the opposite charge contacts the inner surface of the sphere, the charge jumps to the metal, causing a minor shock.
The charge present on the hollow sphere always remain on its outer surface, and there will be no charge on its interior surface. Because there is no charge on the interior surface of the sphere, touching it will not cause harm. When a person with the opposite sign of the same magnitude charge comes into touch with the sphere, both the sphere and the person are neutralized. It only causes a minor shock when there is difference in magnitude. If no one touches the sphere, the charge on the outside surface will be zero, while the charge on the inside surface will be positive.
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What is overtraining?
A.
overloading the muscles too often
B.
progressing through exercises too quickly
C.
muscles that aren't adapting quickly enough
D.
when muscles start atrophying
What is overtraining?
A.
overloading the muscles too often
B.
progressing through exercises too quickly
C.
muscles that aren't adapting quickly enough
D.
when muscles start atrophying
Answer:
A. overloading the muscles too often
Overtraining is overloading your muscles.
What is overtraining?
Overtraining refers to a process when a person continue to exercise despite that he has reach the limit of his ability and ignores the signs of and continues to train. Many believe they need to stress their muscles to be morefit and improve their performance.
Therefore, Overtraining is overloading your muscles.
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28) What is the net force on this box? *
A- 10 N to the left
B- 10 N to the right
C- 60 N to the left
D- 50 N to the right
Answer:
C- 60 N to the left
Explanation:
there is a 60n arrow to the left of the box
AP PHYSICS please answer
vector ????⃗ has a magnitude of 17.9 and its direction is 80∘ counter‑clockwise from the x- axis. what are the x- and y- components of the vector?
We have vector [tex](17.9*cos80^{0},17.9*sin80^{0})[/tex]
Therefore,
x component = 17.9 * cos80 degree = 3.108
y component = 17.9 * sin80 degrees = 17.628
What is a vector?An object with both magnitude and direction is referred to be a vector. A vector can be visualized geometrically as a directed line segment, with an arrow pointing in the direction and a length equal to the magnitude of the vector. The vector points in a direction from its tail to its head.
If the magnitude and direction of two vectors match, they are the same vector. This shows that if we move a vector to a different location without rotating it, the final vector will be the same as the initial vector. The vectors that denote force and velocity are two examples. The direction of force and velocity are both fixed. The size of the vector would represent the force's strength or the velocity's corresponding speed.
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which two statement descibe processes most likely to be involved in the formation of sedimentary rock?
Answer:
Erosion
Explanation:
Sedimentary rocks are created from the build up of sediments, such sediments can be found in stuff like soil, other rocks and many more. Erosion is involved in these type of rocks because the byproduct of erosion are sediments.
Answer:
Rivers... and Windstorms....
Explanation:
I just did it a p e x
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
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:
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
Describe a light wave and explain how light wave travel through solids liquids and gasses
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.
the mass of a high speed train is 4.5 ×× 105 kgkg , and it is traveling forward at a velocity of 8.3 ×× 101 m/sm/s . given that momentum equals mass times velocity, determine the values of mm and nn when the momentum of the train (in kg⋅m/skg⋅m/s ) is written in scientific notation. enter mm and nn , separated by commas.
2. The value of n is 7
What is momentum?Momentum is defined as the product of mass and velocity. It is expressed as
Momentum = mass × velocity
How to determine the value of m and nWe can obtain the value of m and n by simply obtaining the momentum in scientific notation. This is illustrated below:
Mass of train = 4.5×10⁵ KgVelocity of train = 8.3×10¹ m/sMomentum =?Momentum = mass × velocity
Momentum = 4.5×10⁵ × 8.3×10¹
Momentum = 3.735×10⁷ Kg⋅m/s
Thus, the value of m and n are: 3.735 and 7
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conserving fuel is important because burning fuel * 4 points affects the environment. damages the engine. is dangerous in large amoints. is necessary only for long trips.
Conserving fuel is important because burning fuel adversely affects the environment.
How burning fuel affect our environment?When fossil fuels are burned, they release large amounts of carbon dioxide which is a greenhouse gas into the surrounding environment. Greenhouse gases trap heat in the atmosphere that is responsible for global warming. Due to this burning of fuel, a large number of glaciers start melting which leads to drowning of coastal areas and large number of floods.
So we can conclude that Conserving fuel is important because burning fuel adversely affects the environment.
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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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An atom has a mass of 24 and a nuclear charge of 12. Which statement about the atom is accurate?
O It has twice as many protons as electrons.
O It has twice as many neutrons as protons.
O
It has equal numbers of neutrons and protons.
O It has equal numbers of nuclear particles and electrons.
The correct answer is It has equal numbers of neutrons and protons.
A characteristic that can be physically determined, the atomic mass of an atom is equal to the total mass of the protons, neutrons, and electrons that make up the atom. The number of protons in the atom's nucleus is indicated by the atomic number. It is equal to the atomic number in value. Moving over the periodic table causes the nuclear charge to grow. The charge is filled when the electrons approach the protons.
The protons and neutrons of an atom are added to determine the mass number. Therefore, the mass number for each atom will be twice the atomic number (number of protons) if the number of protons (atomic number) and neutrons are identical.
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Find the electric field inside a hollow plastic ball of radius r that has charge q uniformly distributed on its outer surface. Give your answer as a multiple of q/ε0.
There is no electric field inside a hollow plastic ball of radius r that has charge q uniformly distributed on its outer surface.
What is Gauss Law?The hollow plastic ball has no electric field inside of it.
There is no charge inside the ball because the charge is only present on the ball's surface.
Gauss's Law
The total charge contained by a closed surface is equal to Q/0 times the electric flux out of the surface, according Gauss's Law. According to mathematics, the electric flux is the result of the electric field E and the surface area A, and is represented as follows:
Electric field E thus equals zero.
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