Which of the following statements about speed and velocity is correct______
A. Instantaneous velocity is equal to the magnitude of the instantaneous velocity
B. The average speed is equal to the magnitude of the average speed
C. For a moving object, the average velocity over some time cannot be zero
D. For a moving object, the average velocity over some time may be zero
Answer:A
Which of the following statements about speed and velocity is correct______
A. Instantaneous velocity is equal to the magnitude of the instantaneous velocity B. The average speed is equal to the magnitude of the average speed C. For a moving object, the average velocity over some time cannot be zero D. For a moving object, the average velocity over some time may be zero