Question

If you drop a 2.6 kg ball from the top of a 33 m high building, how fast will it be going just before it hits the ground? Round your answer to the nearest tenth and include an appropriate unit for credit.

Answer 1

Given

m = 2.6 kg

h = 33m

vo = 0 m/s

g = 9.8 m/s2

Explanation

Let's solve this question using the free fall equations.

$\begin{gathered} v_f^2=v_o^2+2gh \\ v_f=\sqrt{2gh} \\ v_f=\sqrt{2*9.8m/s^2*33m} \\ v_f=25.43\text{ m/s} \end{gathered}$

The answer would be 25.4 m/s