Acceleration during deceleration · PhysicsBowl 2013 #28

Physics · mechanics

Problem

An object is in free fall close to the ground. A person intervenes and slows the object uniformly to rest. Which one of the following statements must be true about the magnitude of the acceleration of the object as it is being stopped by the person? The magnitude of the object's acceleration is

a

and the magnitude of the acceleration from gravity is

g

. (A)

a < g

(B)

a = g

(C)

a > g

(D)

a \geq g

(E) None of the previous relations must be true.

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