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? Neglect air resistance.
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 formula to calculate the time taken by an object to fall a certain distance under gravity is 
t = √(2h/g)
where,
t = time taken
h = height of the object above the water level
g = acceleration due to gravity (which is approximately 9.8 m/s²)

Substituting the given values, we get
t = √(2 x 41 / 9.8) ≈ 2.9 s

Therefore, the stone will take approximately 2.9 s to hit the water. The closest option is C, which is the correct answer.

To Determine the Height of a Bridge Above the Water,a