Question

The average height of an apple tree is 4.00 meters. How long would it take an apple falling from that height to reach the ground? Given: g = –9.8 meters/second2

Answer 1

Answer:

The time is 0.90 sec.

Explanation:

Given that,

Height = 4.00 m

We need to calculate the time

Using equation of motion

$s = ut-\dfrac{1}{2}(-g)t^2$

For free fall, u = 0

$t =\sqrt{\dfrac{2s}{g}}$

Where, s = distance

g = acceleration due to gravity

t = time

Put the value into the formula

$t =\sqrt{\dfrac{2\times4.00}{9.8}}$

$t= 0.90\ sec$

Hence, The time is 0.90 sec.