Question

A ball is thrown straight upward with initial velocity 15 m/s. Calculate acceleration of the ball at its highest point?

• A. 0
• B. $\frac{1}{2}g$, downward
• C. g, downward
• D. $\frac{1}{2}g$, upward
• E. g, upward

Answer 1

Answer: (C)

g, downward

Throughout the motion of an object thrown up, regardless of the speed of object, the only force acting on the ball is $mg$ downwards. Thus the acceleration of the object is $g$ downwards always.