Question

A frog leaps vertically into the air and encounters no appreciable air resistance.

Which statement about the frog's motion is correct?

On the way up its acceleration is 9.8m/s2 upward, and on the way down its acceleration is 9.8m/s2downward.
On the way up and on the way down its acceleration is 9.8m/s2 downward, and at the highest point its acceleration is zero.
On the way up, on the way down, and at the highest point its acceleration is 9.8m/s2 downward.
At the highest point, it reverses the direction of its acceleration.

Answer 1

At the highest point,it reverses the direction of its acceleration.

Step-by-step explanation:

A free body which accelerates against gravity experiences air resistance,this could be appreciable or non appreciable as assumed in the question.Of which that is a positive acceleration + 9.8 m/s^2.

On attaining its highest point its acceleration becomes zero at that point,as no further acceleration at that point. The free body begins to experience deceleration which is a reverse of positive acceleration denoted as -9.8 m/s ^ 2.

Thank you.