A sphere of mass 50 g moving with velocity of 10m/s collide with the rest block at mass 950 g and embeded . The kinetic energy lost by sphere will be …….

A sphere of mass 50 g moving with velocity of 10m/s collide with the r

1.	A sphere of mass 50 g moving with velocity of 10m/s collide with the rest block at mass 950 g and embeded . The kinetic energy lost by sphere will be …….
Answer» 1 0.95 0.5 0.05 Solution :Initial KINETIC energy = `1/2 mv^(2)` ` = 1/2 xx 0.05 xx100` K = 2.5 J According the conservation of momentum `MV +mv = (M+m)v` ` 0.05 xx10 + 0 = 1V` ` :. `Final kinetic enegy =`1/2 (M+m) v^(2)` ` = 1/2 xx 1XX 0.25` `:. K = 0.125 J ` ` :. K/K =(0.125)/(2.5)` ` :. (K-K)/K = 100 = (2.5-0.125)/(2.5) xx100` ` = 23.75 xx4` ` = 95.00 ` %