Question

An object of mass 15kg is moving with a uniform velocity of 4m/s.What is kinetic energy possessed by the object?

Answer 1

given
Mass of object(m)= 15kg
velocity of the obj(v)= 4m/s
K.E= 1/2mv^2
=1/2 ×15×4^2
=540NJ

Answer 2

Kinetic energy is a type of energy which is obtained during the motion of an object.

The mathematical expression of the kinetic energy is,

E = 1/2 mv²

(Here, E = kinetic energy , m = mass of the object , v = velocity of the object)

And according to the data mentioned in the question,

E= 1/2 × 15 × (4)² = 120 joules

(here the SI unit of kinetic energy is used because the other units mentioned in the question are also in SI format ).