Question

A man with mass 82 kg runs at a speed of 2.8 m/s. How much kinetic energy does he have?

Answer 1

KE=1/2 m*v^2
1/2*82*2.8^2=321.4

321.4J

Answer 2

Kinetic energy, E = 321.44 Joules

Step-by-step explanation:

It is given that,

Mass of the man, m = 82 kg

Speed of the man, v = 2.8 m/s

Let E is the kinetic energy of the man. The energy possessed by an object due to its motion is called kinetic energy. The mathematical formula is given by :

`E=(1)/(2)mv^2`

`E=(1)/(2)* 82* (2.8)^2`

E = 321.44 Joules

So, the kinetic energy of the man is 321.44 Joules. Hence, this is the required solution.