A car traveling with velocity v is decelerated by a constant acceleration of magnitude a. It takes a time t to come to rest. If its initial velocity were doubled, the time required to stop would
A) double as well.
B) decrease by a factor of two.
C) stay the same.
D) quadruple.
E) decrease by a factor of four.

Question

Quizplus · Accepted Answer

The time to stop is directly proportional to the initial velocity when deceleration is constant. If the initial velocity is doubled, the time required to stop will also double.

A Car Traveling with Velocity V Is Decelerated by a Constant