Which of the following describes an object that is moving with an unchanging speed but a changing velocity?
A) A car rounding a curve at a steady 80 km/hr.
B) A car moving up a straight hill [a hill whose "slope" is unchanging] at a steady 80 km/hr, when the car is midway up the hill.
C) A car moving along a straight horizontal (level) line at a steady 80 km/hr.
D) A car slowing down while moving along a straight line.
E) Both answers C and D are correct.

Question

Quizplus · Accepted Answer

An object moving with an unchanging speed but a changing velocity is undergoing a change in direction. A car rounding a curve at a steady speed has a changing velocity because its direction is changing.

Which of the Following Describes an Object That Is Moving