Browse Questions

# Consider the following one-dimensional motion.A spacecraft drifts through space at constant velocity. Which of the following statements are true?

(1) The instantaneous velocity is always zero

(2) The average velocity cannot be calculated from the information given

(3) At no point does the average velocity equal the instantaneous velocity

(4) The average velocity = instantaneous velocity over all time intervals

(2): We don't have information to calculate the average velocity.
(4): Because the spacecraft’s instantaneous velocity is constant, its instantaneous velocity at any time and its average velocity over any time interval are the same