Question

A 1.4 kg coconut falls from rest out of a tree. The instant before it hits the ground, it has a velocity of 6.7 m/s. How high was the coconut initially?

Answer 1

2.29m

Step-by-step explanation:

Given parameters:

Mass of the coconut = 1.4kg

Final velocity = 6.7m/s

Initial velocity = 0m/s

Unknown:

Height of the coconut initially = ?

Solution:

To solve this problem, we use one of the kinematics equation. The one given below is the best one to use.

V² = U² + 2gH

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity

H is the height

So;

6.7² = 0² + (2 x 9.8 x h)

44.89 = 19.6h

h = 2.29m