To specify an object's velocity completely,we need to specify
A) its speed.
B) the rate of change of its acceleration.
C) its direction of travel.
D) its speed and direction of travel.

Question

Quizplus · Accepted Answer

To specify an object's velocity completely, we need to specify both its speed and direction of travel. Speed alone doesn't provide information about the direction of motion, and the rate of change of acceleration is not needed to specify an object's velocity. Therefore, the best choice is D, which includes both the speed and direction of travel.

To Specify an Object's Velocity Completely,we Need to Specify