Examples of inelastic collisions

Q1 A person is shot with a large calibre bullet. The mass of the bullet is 50g, and the mass of the person is 60kg. The bullet moves at 200m/s

(a)  Calculate the velocity with which the person is knocked off their feet. 0.17m/s

(b)  Calculate the kinetic energy before and after the collision. 1000J, 0.87J

Q2 A hand grenade explodes and bursts into two fragments, one of mass 200g and one of mass 350g. The two bits fly in opposite directions, the smaller one at 50m/s. How fast does the larger one fly off? 28.6m/s

Q3 A shotgun is fired – the pellets have a mass of 20g and shoot out at 100m/s. The gun has a mass of 10kg. What backwards velocity will the gun recoil with? 0.2m/s

Examples of inelastic collisions

Q1 A person is shot with a large calibre bullet. The mass of the bullet is 50g, and the mass of the person is 60kg. The bullet moves at 200m/s

(c)  Calculate the velocity with which the person is knocked off their feet. 0.17m/s

(d)  Calculate the kinetic energy before and after the collision. 1000J, 0.87J

Q2 A hand grenade explodes and bursts into two fragments, one of mass 200g and one of mass 350g. The two bits fly in opposite directions, the smaller one at 50m/s. How fast does the larger one fly off? 28.6m/s

Q3 A shotgun is fired – the pellets have a mass of 20g and shoot out at 100m/s. The gun has a mass of 10kg. What backwards velocity will the gun recoil with? 0.2m/s

Examples of inelastic collisions

Q1 A person is shot with a large calibre bullet. The mass of the bullet is 50g, and the mass of the person is 60kg. The bullet moves at 200m/s

(e)  Calculate the velocity with which the person is knocked off their feet. 0.17m/s

(f)  Calculate the kinetic energy before and after the collision. 1000J, 0.87J

Q2 A hand grenade explodes and bursts into two fragments, one of mass 200g and one of mass 350g. The two bits fly in opposite directions, the smaller one at 50m/s. How fast does the larger one fly off? 28.6m/s

Q3 A shotgun is fired – the pellets have a mass of 20g and shoot out at 100m/s. The gun has a mass of 10kg. What backwards velocity will the gun recoil with? 0.2m/s