Question

4.The mass of a person is 65 kg. How fast should he run so that his kinetic energy is 812.5 )?
[Ans. 5 m/s​

Answer 1

Explanation:

Given

• M = 65 kg
• KE = 812.5

KE = (1/2) mv^2

812.5 = (1/2)65*v^2

812.5 = (1/2)65*v^2

v = {(812.5 * 2)/65}^1/2 m/s

= 5 m/s