what is the kinetic energy

Question

What is the kinetic energy of a girl with mass of 40kg running steadily at a speed of 5ms

Answer 1

KE = (1/2)mv²

• m = mass in kg = 40 kg
• v = speed in m/s = 5 m/s

 

Plug in the numbers and compute the answer.  The units of KE are "joules".