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While sitting at a bus stop, a car drives past you going to the right with...

While sitting at a bus stop, a car drives past you going to the right with a speed v. Less than a minute later, the same car drives past you to the left at the same speed v. Assume that the contents of the car didn't change between those two times.

What can you say about the net impulse on the car between those two times ?

a It points right

b It points left

c It is zero

d It is downward

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