Question

Calculate the kinetic energy of a boy of mass 65kg running with average speed of 20m/s (3mks)

Answer 1

Answer:  13000 joules

This is equivalent to 13 kilojoules.

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Work Shown:

m = 65 kg = mass

v = 20 m/s = velocity

KE = kinetic energy

KE = (1/2)*m*v^2

KE = (1/2)*65*(20)^2

KE = 13000 joules

This can be written as 13 kilojoules since "kilo" means "1 thousand"

The abbreviation of the unit "joules" is the letter J.