To determine the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. If the height of the bridge is 41 m, how long will it take for the stone to hit the water?
A) 2.3 s
B) 2.6 s
C) 2.9 s
D) 3.2 s
E) 3.6 s

Question

Quizplus · Accepted Answer

The time it takes for an object to fall from a height h is given by the formula t = √(2h/g), where g is the acceleration due to gravity (approximately 9.8 m/s²). Plugging in the values, t = √(2*41/9.8) ≈ 2.9 seconds.

To Determine the Height of a Bridge Above the Water