Which of the following is an example in which you are traveling at constant speed but not at constant velocity?
A)rolling freely down a hill in a cart,traveling in a straight line
B)driving backward at exactly 50 km/hr
C)driving around in a circle at exactly 100 km/hr
D)jumping up and down,with a period of exactly 60 hops per minute
E)none of the above

Question

Quizplus · Accepted Answer

Constant speed means the magnitude of the velocity is constant. However, velocity is a vector quantity and includes both magnitude and direction. In choice C, the object is moving at a constant speed of 100 km/hr, but its direction is constantly changing as it travels in a circle, so it is not moving at constant velocity.

Which of the Following Is an Example in Which You