A stone is projected vertically upward from ground level
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power
Problem
A stone is projected vertically upward from ground level. Air resistance acts on it throughout the motion. Which statement best describes the stone’s mechanical energy when it momentarily comes to rest at the highest point?
(a) It equals the initial value because the gain in potential energy exactly equals the loss of kinetic energy.
(b) It is zero because with the kinetic energy gone, all the energy has been dissipated by air resistance.
(c) It is less than the initial value because air resistance has done negative work on the stone.
(d) It is greater than the initial value because the potential energy at the top is maximum.