A ball is thrown straight upward from ground level with a speed of $18 \mathrm {~m} / \mathrm { s }$ How much time passes before the ball strikes the ground if we disregard air resistance?
A)3.7 s
B)1.8 s
C)1.1 s
D)0.6 s

Question

Quizplus · Accepted Answer

The time to reach the highest point is $ t = \frac{v}{g} = \frac{18}{9.8} \approx 1.84 $ s. The total time for the round trip is twice this, approximately 3.7 s.

A Ball Is Thrown Straight Upward from Ground Level with a Speed