Question

What is the energy of a 70 kg man running at 4 m/s? How much energy does the man have? *

Answer 1

Answer:

560J

Explanation:

Given parameters:

Mass of the man = 70kg

Velocity  = 4m/s

Unknown:

The amount of energy the man has = ?

Solution:

Energy is the ability to do work by a body. A body in motion is said to have kinetic energy and this can be derived using the expression below:

  K.E  = $\frac{1}{2}$ m v²

m is the mass

v is the velocity

Insert the parameters and solve;

      K.E  =  $\frac{1}{2}$ x 70 x 4²  = 560J