A block is released from rest and allowed to fall freely under gravity
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics
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 a and of the net force ∑F acting on it?
(a) a positive, ∑F positive
(b) a negative, ∑F negative
(c) a zero, ∑F negative
(d) a negative, ∑F zero