A car whose speed is a steady 50 km/h
A) cannot be accelerated.
B) is accelerated when it climbs a hill.
C) is accelerated when it descends a hill.
D) is accelerated when it climbs a hill, goes over the crest, and descends on the other side.

Question

Quizplus · Accepted Answer

Acceleration refers to any change in velocity, which includes changes in speed or direction. When a car climbs a hill, goes over the crest, and descends, its direction changes, indicating acceleration even if the speed remains constant.

A Car Whose Speed Is a Steady 50 Km/h