A 60 kg man skating with a speed of 10 m/s collides with a 40 kg skater at rest and they cling to each other. Find the loss of kinetic energy during the collision.

Explanation

Mass of the man,
`m-1=60kg`
speed of the man `=v_1=10m/s`
Massof the skater `m_2=40kg`
Let its velocity =v
`:. 60xx10+0=100xxv`
`rarr v_1=6m/s`
`loss in K.E. =(1/2)60xx(10)^2-1/2xx100xx36`
`=1200J`