Physics

Physics

Problem

A block is released from rest and allowed to fall freely under gravity. If the upward direction is taken as positive, which option correctly gives the signs of its acceleration aa and of the net force ∑F\sum F acting on it? a) aa positive, ∑F\sum F positive b) aa negative, ∑F\sum F negative c) aa zero, ∑F\sum F negative d) aa negative, ∑F\sum F zero

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