Question

A 4.0-kg object has 72 J of kinetic energy.
Determine its speed.

Answer 1

6m/s

Step-by-step explanation:

v = sqrt of 2KE/m

Where:

KE = kinetic energy

m = mass of a body

v = velocity of a body

= sqrt of 2(72)/4

= sqrt of 144/4

= sqrt of 36

= 6m/s