Question

Find the mass of an object moving with a velocity of 4m/s and possessing a KE of 120J

Answer 1

Answer:

KE = 1/2 m v^2

Given,

Kinetic Energy, KE = 120J

Velocity, v = 4 m/s

Mass = ?

Put the values directly in the equation of KE

120 = 1/2 m v^2

120 = 1/2 m (4)^2

240 = m 16

m = 240/16

therefore, m=15kg

Answer 2

Answer:

KE= 1/2 ×mv2

given v=4m/s

KE= 120 J

on solving

m=15kg