Question

At the highest point in the trajectory of a baseball, which one of the following is true?

A. Its acceleration is -9.8 m/s2, and its velocity is -9.8 m/s.
B. Its acceleration is -9.8 m/s2, and its velocity is the same as its initial velocity.
C. Its acceleration is -9.8 m/s2, and its velocity is zero.
D. Its acceleration is zero, and its velocity is zero.

Answer 1

A projectile has a vertical acceleration of -9.8 m/s² in all its points, and at the highest point in the trajectory his velocity is zero in the vertical direction.

The correct option is C.