Question

Laquite wants to toss a tennis ball straight up to Michele who is 5 meters above her. If the wants the ball to stop just as it reaches Michele, how fast should she toss the ball?

Answer 1

Answer:

The initial speed of the tennis ball is 9.89 m/s.

Explanation:

Given that,

Laquite wants to toss a tennis ball straight up to Michele who is 5 meters above her. Final speed of the ball is should be 0. We need to find the initial velocity of the ball. It can be calculated using the conservation of energy as :

$u=\sqrt{2gh} \\\\u=\sqrt{2\times 9.8\times 5} \\\\u=9.89\ m/s$

So, the initial speed of the tennis ball is 9.89 m/s. Hence, this is the required solution.