A lightweight object and a very heavy object are sliding with equal speeds along a level frictionless surface.They both slide up the same frictionless hill with no air resistance.Which object rises to a greater height?
A)The heavy object,because it has greater initial kinetic energy.
B)The light object,because gravity slows it down less.
C)The lightweight object,because the force of gravity on it is less.
D)The heavy object,because it has more mass to carry it up the hill.
E)They both slide to exactly the same height.

Question

Quizplus · Accepted Answer

Both objects have the same initial kinetic energy, which gets converted to potential energy as they move up the hill. Since they both have the same speed and encounter the same gravitational force, they will both rise to the same height. The mass of the objects is not a factor since they both have the same initial velocity. The force of gravity is the same for both objects because it depends on the mass of the object producing the gravity, not the object being affected by it. Therefore, the correct choice is E - they both slide to exactly the same height.

A Lightweight Object and a Very Heavy Object Are Sliding