6. You are riding in a bumper car going 8 m/s. You hit a stopped bumper car of e
ID: 1991545 • Letter: 6
Question
6. You are riding in a bumper car going 8 m/s. You hit a stopped bumper car of equal mass squarely from behind, and your car stops. What is the speed of the other car immediately after the collision? Why?Please tell me what's right/wrong with my answer: The speed of the other car is also 8 m/s because the initial momentum is equal to the final momentum, as in Newton’s Third Law of Motion. Because momentum cannot be created or destroyed, it must be transferred from the car from behind into the car receiving the impact, and momentum is transferred to the other car by giving it an impulse. Since the momentum gained by the one car is equal to the momentum lost by the other car, we say that momentum is transferred from one car to the other.
P = m · v
Pi = Pf
Explanation / Answer
we have, Pi = Pf m x 8 + m x v = m x 0 + m x v' as it is a elastic collision, there will be compelte transfer of energy. Hence speed of other car will also be 8 m/s you are correct !!
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