The rate of gravity, the acceleration of an object in freefall, is approximately 10 m/s² A ball takes 5 seconds to reach the ground when dropped off a building. If the ball begins the fall with 0 velocity, how fast is the ball moving when it reaches the ground?

Question

Quizplus · Accepted Answer

Step 1: Find the change in velocity Acceleration (a) = Change in Velocity (dV) / Change in Time (dt) a = dV / dt To solve for the change in velocity, V, multiply both sides by dt a × dt = dV 10 m/s² × 5 s = 50 m/s The change in velocity is 50 m/s and since the ball started at rest, the final velocity is 50 m/s.

The Rate of Gravity, the Acceleration of an Object in Freefall