Work, Energy, and Power · Paper 1 — Free Physics SL Practice Questions

A satellite travels at constant speed in a circular orbit of radius $r$ around Earth. At every point in the orbit, the gravitational force on the satellite has magnitude $F$ and is directed toward the centre of Earth. What is the net work done by the gravitational force on the satellite during one complete orbit?

A box slides down a frictionless inclined plane of length $3.0\text{ m}$ inclined at $30°$ to the horizontal. The weight of the box is $50\text{ N}$. What is the work done by the weight of the box as it slides from the top to the bottom of the plane?

A force $F$ acts on an object in the direction of motion. The graph shows $F$ varying linearly from $10\text{ N}$ at $s = 0$ to $0\text{ N}$ at $s = 4.0\text{ m}$. What is the work done by the force over this displacement?

A roller coaster car of mass 500 kg starts from rest at point A, which is 40 m above the ground. It travels along a frictionless track to point B, which is 15 m above the ground. What is the speed of the car at point B?