A box rests on the (frictionless) bed of a truck. The truck driver starts the truck and

Question:

A box rests on the (frictionless) bed of a truck. The truck driver starts the truck and accelerates forward. The box immediately starts to slide toward the rear of the truck bed. Discuss the motion of the box, in term of Newton€™s laws, as seen
(a) By Mary standing on the ground beside the truck and
(b) By Chris who is riding on the truck (Fig 4.35)

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