Truck of mass 5*10^4 kg moving west at 80km/hr collides head on with a car of mass 1.5*10^3kg moving east at 1

Question

truck of mass 5*10^4 kg moving west at 80km/hr collides head on with a car of mass 1.5*10^3kg moving east at 100km/hr. In which direction and at what speed do they move after the collision?

Answer 1

Conservation of momentum question. We assume it is a 'simple' kind of collision, therefore neglect to factor in deformation, heat produced and sound produced.

Momentum1=M1 x V1 (sub in for M1 the mass of the truck; and it's velocity = V1) [WEST]

Momentum2=M2 x V2  (sub in for M2 the mass of the car; and it's vel - V2). [EAST}

= Momentum1 - Momentum2 [WEST]

Convert the final answer from kg.km/hr to kg.ms^-1