Question

A 2.80 kg mass is dropped from a height of 4.50 m. Find its potential energy when it reaches the ground.

Answer 1

0

Step-by-step explanation:

There is 0 PE when its on the ground

Answer 2

123.48J

Step-by-step explanation:

Given parameters:

Mass of the ball = 2.8kg

Height = 4.5m

Unknown:

Potential energy = ?

Solution:

The potential energy is the energy due to the position of a body. It is mathematically given as;

P.E = mgh

m is the mass

g is the acceleration due to gravity

h is the height

Now insert the parameters and solve;

P.E = 2.8 x 4.5 x 9.8 = 123.48J