A soccer ball with a mass of 0.45 kg is kicked and is moving at 8.9 m/s. Find the kinetic

energy of the ball.

17.82J

Explanation:

Kinetic energy = 1/2 mv^2

Given

Mass M = 0.45kg

Velocity v = 8.9m/s

Therefore,

K. E. = 1/2 x 0.45 x (8.9) ^2

= 1/2 x 0.45 x (8.9 x 8.9)

= 1/2 x 0.45 x 79.21

Multiply through

= 35.6445/2

= 17.82J

The kinetic energy of the ball is 17.82J