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1. At a local farm, you buy a few pumpkins to turn into Jack-o-Lanterns and
place them on the backseat of the car. On the way home, you begin to
brake as you approach a stop sign. At first the pumpkins stay put, but as
you brake a bit harder, they begin to slide off of the seat. (a) Explain
using the concept of friction and (b) then explain using the idea of
inertia.