Question

A ball dropped from the roof of a tall building will fall approximately how far in two seconds? (A) 10 m, (B) 20 m, (C) 30 m, (D) 40 m, (E) 50 m.

Answer 1

Answer:

The ball covered the distance in 2 second is 20 m.

(b) is correct option.

Explanation:

Given that,

Time = 2 sec

Using equation of motion

$s = ut+\dfrac{1}{2}gt^2$

Where, s = height

u = initial velocity

g = acceleration due to gravity

t = time

Put the value in the equation

$s = 0+\dfrac{1}{2}\times9.8\times2^2$

$s = 19.6\ approx\ 20\ m$

Hence, The ball covered the distance in 2 second is 20 m.