Question

A 0.250-kg ball is thrown upwards with an initial velocity of 12.0 m/s Determine the acceleration of the ball when it has reached the peak of it's trajectory. Assume negligible air resistance.​

Answer 1

No math needed here. The only force acting on the ball is gravity. Gravity provides an acceleration of 9.8 m/s^2 downwards. This is the acceleration of the ball at every point along its trajectory, including the peak (when the VELOCITY is zero).