A brick is dropped from rest from a height of 4.9 m. How long does it take the brick to reach the ground?
A)0.6 s
B)1.0 s
C)1.2 s
D)1.4 s
E)2.0 s

Question

Quizplus · Accepted Answer

The time taken for an object to fall from rest under gravity can be calculated using the formula $ t = \sqrt{\frac{2h}{g}} $, where $ h = 4.9 \, \text{m} $ and $ g = 9.8 \, \text{m/s}^2 $. Substituting the values, $ t = \sqrt{\frac{2 \times 4.9}{9.8}} = \sqrt{1} = 1.0 \, \text{s} $.

A Brick Is Dropped from Rest from a Height of 4.9