A baseball is thrown vertically upward and feels no air resistance.As it is rising
A) both its momentum and its mechanical energy are conserved.
B) its momentum is not conserved, but its mechanical energy is conserved.
C) both its momentum and its kinetic energy are conserved.
D) its kinetic energy is conserved, but its momentum is not conserved.
E) its gravitational potential energy is not conserved, buts its momentum is conserved.

Question

Quizplus · Accepted Answer

When the baseball is thrown vertically upward, only gravity is acting on it. Therefore, there is no external force acting on it and its mechanical energy is conserved. However, the baseball's momentum is not conserved, as it is constantly changing direction due to the force of gravity.

A Baseball Is Thrown Vertically Upward and Feels No Air