If you toss a ball straight upward at 40 m/s,with no air resistance it returns to you at a speed of
A)zero.
B)10 m/s.
C)40 m/s.
D)more than 40 m/s.

Question

Quizplus · Accepted Answer

In the absence of air resistance, the ball will return at the same speed it was thrown upwards due to the conservation of energy. The only forces acting on the ball are gravity and the initial force that threw it upwards. Gravity slows the ball down on its way up and speeds it up at the same rate on its way down, so it returns at the initial speed of 40 m/s.

If You Toss a Ball Straight Upward at 40 M/s,with