Question Detail

PHY 101 PHY 101 Past Questions Objective Question

Question

A stone is released with zero velocity from the top of a tower reaches the ground in 4 seconds, the height of the tower is about
Options
A 20 m
B 40 m
C 80 m
Correct Answer
D 16 m
Correct Answer

Option C is the correct answer.

Detailed Explanation

Using h = ½gt², with g ≈ 10 m/s², t = 4 s, h = ½ × 10 × 16 = 80 m.

Hint

For free fall from rest, height = ½gt².

Question Info