Question

which of the following best describes speed?
change in velocity over time
direction of motion
position of an object
distance traveled per unit time

Explanation:

• "Change in velocity over time" defines acceleration, not speed.
• "Direction of motion" is a component of velocity, not speed.
• "Position of an object" refers to location, not speed.
• Speed is a scalar quantity that measures how much distance an object covers in a given time period.

Answer:

D. Distance traveled per unit time