Question

When an object falls due to gravity on Earth, the acceleration is 9.8 m/s. A student drops a rock

down a mineshaft. It takes 3.00 seconds for the rock to hit the bottom of the shaft. What is the
velocity of the rock as it impacts?

Answer 1

29.4 m/s

Explanation:

Use v = at with a = 9.8 m/s^2 and t = 3.00 sec

v = 9.8 * 3.00 = 29.4 m/s