A car moves such that its velocity decreases uniformly from to in
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics
Problem
A car moves such that its velocity decreases uniformly from 20m s−1 to 4m s−1 in 8s, while always remaining in the positive direction. What is the sign of its instantaneous acceleration during this interval?
(a) Always positive
(b) Always negative
(c) Always zero
(d) Changes from positive to negative