A stone is dropped from a height of 20.0 m.How long does it take for it to hit the ground?
A)1.00 s
B)2.02 s
C)1.43 s
D)0.50 s
E)2.37 s

Question

Quizplus · Accepted Answer

The time it takes for an object to fall can be calculated using the formula $t = \sqrt{\frac{2h}{g}}$, where $h$ is the height (20.0 m) and $g$ is the acceleration due to gravity (approximately 9.81 m/s$^2$). Plugging in the numbers, $t = \sqrt{\frac{2 \times 20.0}{9.81}} \approx 2.02$ seconds.

A Stone Is Dropped from a Height of 20