A rock is thrown straight up with an initial velocity of 22.54 m/s.What time interval elapses between the rock's being thrown and its return to the original launch point? (Acceleration due to gravity is 9.80 m/s². )

Question

Quizplus · Accepted Answer

The time to reach the highest point is given by t = v/g = 22.54 m/s / 9.80 m/s² = 2.30 s. The total time for the round trip is twice this, so 2 * 2.30 s = 4.60 s.

A Rock Is Thrown Straight Up with an Initial Velocity