A 73.1-kg skier rides a 2520-m-long lift to the top of a mountain. The lift makes an angle of 17.2° with the horizontal. What is the change in the skier's gravitational potential energy? Number Units

Q: 3. A 5 kg block is initially at rest on a horizontal frictionless surface. Two forces, F = (4 – x2)i…

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Q: A youngster rides on a skateboard with a speed of 2m/s. After a force acts on the youngster, her…

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Q: A 1680 kg car skids on a level road with coefficient of kinetic friction 0.64 between the tires of…

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Q: On a frictionless horizontal surface, a block is pushed up against a 70,425 N/m spring and…

A: Given data: The spring constant k=70425 N/m The speed of the block when it released v=27 m/s The…

Q: What is the change in gravitational potential energy when an 8.0 kg brick is lifted a height of 4.5…

A: Given  A 8 kg brick is lifted to a height of 4.5 m. Find change in gravitational potential energy.

Q: elevator cable breaks when a 925 kg elevator is 22.5 m above the top of a huge spring (k = 8.00×104…

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Q: A 15.1-kg box is being pushed from the bottom to the top of a frictionless ramp. When the box is…

A: Write the given values with the suitable variables. m=15.1 kgW=58 Ju=0 m/sv=1.50 m/s Here, m, W, u,…

Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…

A: The rate  of doing work is called power.

Q: Question: A person lifts a 1.75kg mass in the vertical direction through a distance of 1.35 meters.…

A: Given value--- mass = 1.75 kg. vertical distance= 1.35 m. We have to find--- Calculate the amount…

Q: You lift a 1 kg object from the floor to the top of a 1.5 m high table. 1. What is the force needed…

A: Given: The mass of the object is 1 kg. The dsiplacement of the object is 1.5 m from floor to top of…

Q: A 2.0 kg block slides down a rough curved track. The block has a speed of 5.0 m/s after its height…

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Q: A 0.636 kg object is launched straight upward with an initial velocity of 30.2 m/s. Upon reaching…

A: The change in gravitational potential energy of an object is the difference in its potential energy…

Q: A 2.56 kg cart moving along a horizontal track in the positive x direction has a changing force…

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Q: A 100 kg crate slides 10.0 m down a 40 degree incline. The coefficient of friction is 0.20. What is…

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Q: If the gravitational potential energy of 5 Kg rock is 980 J. How high is the rock above the ground?…

A: Given: The mass of the rock is m=5 kg. The gravitational potential energy of rock is E=980 J.…

Q: A box is pulled 2.0 meters along a rough surface at constant velocity using 100 N force inclined at…

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Q: 50 - meter rope with a mass of 30 kg is dangling over the edge of a cliff. Ignoring friction, how…

A: Mass (m) = 30 kgLength of rope (L) = 50 m

Q: A50 kg skater is moving at 6.1 m/s when he starts up a hill. What is the gravitational potential…

A: Given  Mass of skater (m) = 50 kg Initial velocity (vi) = 6.1 m/s   When skater stopped  Final…

Q: Roy pulls a box of mass 19.7 kilograms across a horizontal floor by exerting a force of 96.4 newtons…

A: Given Mass of box = m = 19.7 kg Force apply by the Roy = F = 96.4 N angle above the horizontal in…

Q: A curious little girl held a 0.23-kg stone 1.2 m above the top edge of a water well and then dropped…

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Q: A baseball with a mass of 0.150kg is tossed upward with a speed of 42.0m/s. Taking the launch point…

A: When the ball is at its maximum height than its velocity in vertical direction is zero. Apply the…

Q: A single force acts on a 0.99 kg particle-like object in such a way that the position of the object…

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Q: A sled of mass 70 kg starts from rest and slides down a 10° incline 80 m long. It then travels for…

A: Given that-Mass of the sled, m= 70 kgLength of the plane, L= 80 mAngle of inclination of the plane…

Q: 2. A spring on a horizontal surface can be stretched and held 0.5 meters from its equilibrium…

A: Given: The stretching in the spring due to force 50 N is 0.5 m from the equilibrium.

Q: A student lifts a 1.32-kg book from her desk to a bookshelf.

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Q: The (non-conservative) force propelling a 1.50 x 10³-kg car up a mountain road does 8.80 x 106 J of…

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Q: A 1000 kg wrecking ball hangs from a 15-m-long cable. The ball is pulled back until the cable makes…

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Q: A 25-kg child slides down a playground slide that is 6.6 m long and makes an angle of 30° above the…

A: The change in potential energy is 808.5 joul

Q: A pole-vaulter just clears the bar at 4.35 m and falls back to the ground. The change in the…

A: The change in the gravitational potential energy is given by the formula, ∆U=mg∆h…

Q: A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of…

A: The work done by air resistance  will be equals to   change in energy . That is difference  of…

Q: A spring with a spring constant of (4.4907x10^4) N/m is stretched from an initial extension of…

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Q: The brakes of a truck cause it to slow down by applying a retarding force of 6370 N to the truck…

A: Given data:  Force (F) = 6370 N Distance (d) = 1160 m Angle between force and displacement (θ) =…

Q: 0.508 kg object is launched straight upward with an initial velocity of 25.1 m/s. Upon reaching its…

A:

Kinematics

A machine is a device that accepts energy in some available form and utilizes it to do a type of work. Energy, work, or power has to be transferred from one mechanical part to another to run a machine. While the transfer of energy between two machine parts, those two parts experience a relative motion with each other. Studying such relative motions is termed kinematics.

Kinetic Energy and Work-Energy Theorem

In physics, work is the product of the net force in direction of the displacement and the magnitude of this displacement or it can also be defined as the energy transfer of an object when it is moved for a distance due to the forces acting on it in the direction of displacement and perpendicular to the displacement which is called the normal force. Energy is the capacity of any object doing work. The SI unit of work is joule and energy is Joule. This principle follows the second law of Newton's law of motion where the net force causes the acceleration of an object. The force of gravity which is downward force and the normal force acting on an object which is perpendicular to the object are equal in magnitude but opposite to the direction, so while determining the net force, these two components cancel out. The net force is the horizontal component of the force and in our explanation, we consider everything as frictionless surface since friction should also be calculated while called the work-energy component of the object. The two most basics of energy classification are potential energy and kinetic energy. There are various kinds of kinetic energy like chemical, mechanical, thermal, nuclear, electrical, radiant energy, and so on. The work is done when there is a change in energy and it mainly depends on the application of force and movement of the object. Let us say how much work is needed to lift a 5kg ball 5m high. Work is mathematically represented as Force ×Displacement. So it will be 5kg times the gravitational constant on earth and the distance moved by the object. Wnet=Fnet times Displacement.