Question

A 1000-kg car traveling at 50 m/s runs into the rear of a stopped car that has a mass of 1500 kg and they stick together. What is the speed of the cars after the collision?

Answer 1

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Answer 2

Try the conservation of momentum. The sum of the momenta before the collision will be the momentum of the system after the collision. Momentum for an object of mass \(m\) and velocity \(\vec v\) is given by \(\vec p = m\vec v\).

Answer 3

so this is a momentum problem! gotta love physics =)

ok so usually we use something like this.

p1=m1v1
p1=1000kg*50m/s
p1=50000kg*m/s

p2(p2=p1 because they are both one mass at the end of the question.) sooo


50,000=2500kg*v
50,000/2500=20m/s=v

There ya go. =)