Question

A moveing body of 40 kg has 180 joules of KE calculate the speed​

Answer 1

Answer:

3 m/s

Explanation:

Given,

Mass ( m ) = 40 kg

Kinetic energy ( K.E ) = 180 J

To find : speed ( v ) = ?

K.E = ( m v^2 ) / 2

2 x K.E = m v^2

v^2 = ( 2 K.E ) / m

      = ( 2 x 180 ) / 40

      = 360 / 40

v^2 = 9

v = √9

v = 3 m/s

Therefore, the speed is 3 m/s.