Question

what velocity a body having mass 4kg posses the kinetic energy 32 joule

Answer 1

Answer:

The required velocity of the body is 4 m/s.

Explanation:

Given :

Mass of a body, m = 4 kg

Kinetic energy, KE = 32 J

To find :

the velocity of the body

Solution :

The kinetic energy is the energy possessed by an object by virtue of its motion.

It's given by the expression :

• KE = ½ mv²

where

m denotes the mass of the object

v denotes the velocity of the object

Substituting the values,

KE = ¹/₂ mv²

⇒ 32 = ¹/₂ × 4 × v²

⇒ 32 = 2v²

⇒ v² = 32/2

⇒ v² = 16

⇒ v = √16

⇒ v = 4 m/s

∴ The velocity of the body is 4 m/s.