An object falling vertically at a speed of $20 \mathrm{~m} / \mathrm{s}$ lands in a snowbank and comes to rest $0.5 \mathrm{~s}$ later. The object's average acceleration during this interval is
A) Upward
B) Downward
C) Zero

Question

Quizplus · Accepted Answer

The object's average acceleration is upward because it is decelerating (coming to rest from a downward velocity), which means the acceleration is in the opposite direction of its initial velocity.

An Object Falling Vertically at a Speed Of 20 m/s20 \mathrm{~m} / \mathrm{s}20 m/s

An Object Falling Vertically at a Speed Of $20 \mathrm{~m} / \mathrm{s}$