Question

A ball is tossed up into the air, reaches its highest point and returns to its original position. which of the following is true about the balls velocity and acceleration at its highest point? IF YOU CAN CAN YOU PLS EXPLAIN
a) it’s velocity and acceleration are both zero



b) it’s velocity is up and non zero constant and acceleration is zero



c) it’s velocity is down and non zero constant and acceleration is zero



d) it’s velocity is zero and acceleration is up and non zero constant



e) it’s velocity is zero and acceleration is down and non constant zero

Answer 1

Answer: (Projectile motion)

Option A — At its highest point the ball’s velocity is 0 and so it it’s acceleration (0).

This is because at the highest point, the ball’s direction changes. This is due to the forces counteracting the upward momentum (mass*velocity) of the ball, so the ball slows down and when it reaches it highest point starts to change direction and fall back down. In the short period of time at which its at its highest point, it’s velocity reaches 0 for a very short amount of time, and so does its acceleration.