A football, a hockey puck, and a tennis ball all fall down in the absence of air resistance. Which of the following is true about their acceleration? A. The acceleration of the football is greater than the other two B. The acceleration of the hockey puck is greater than the other two C. The acceleration of the tennis ball is greater than the other two D. They all fall down with the same constant acceleration E. More information is required

The right answer is D. They all fall down with the same constant acceleration

Explanation:

A football, a hockey puck, and a tennis ball all fall down in the absence of air resistance. Assuming initial velocity is zero i. e. all three are in free fall condition, in this case the acceleration due to gravity will act on the objects, which is a constant irrespective of the size and shape of the object.

Therefore, they all fall down with the same constant acceleration.