whats the momentum

Question

When you are traveling in your car at highway speed,
the momentum of a bug is suddenly changed as it splatters
onto your windshield. Compared with the change in
momentum of the bug, by how much does the momentum
of your car change?

Answer 1

Momentum is mass times velocity. The total momentum of the system bug-car stays the same during the collision, so the change in the car's momentum is equal and opposite to the change in the bug's momentum.

 

Since the car's mass is much higher than the bug's mass, the bug's velocity will change much more than the car's velocity.