Question

A bullet of gun going horizontal with velocity of 400 m/s embedded in a bag of sand and comes to rest. The masses of bullet and bag respectively 0.025 kg and 1.975 kg. Find out velocity of (bullet + sand). How much loss of kinetic energy is in this process?

Answer 1

Given; mass of the bullet m = 0.025 kg and its velocity u = 400ms^-1, mass of sand bag M = 1.975 kg; joint velocity u =?

∵ Joint velocity,

Final kinetic energy