Question

The mass of a person is 65 kg. How fast should he run so that his kinetic energy is 812.5 J?

Answer 1

Answer:

kinetic energy is defined as KE= 1/2 mv^2

Explanation:

Thus, 812.5 = 1/2 x 65 x v^2

            v^2 = 25

                v = 5 m/s

Answer 2

Answer:

its simple bro

just apply ke=1/2 mv^2

812.5=1/2 x 65 X v^2

on solving you get

v^2=25

v =5m/s