Author Question: When can we be certain that the average velocity of an object is always equal to its instantaneous ... (Read 261 times)

jlmhmf · **on:** Jul 29, 2018

When can we be certain that the average velocity of an object is always equal to its instantaneous velocity?

A) always
B) never
C) only when the velocity is constant
D) only when the acceleration is constant
E) only when the acceleration is changing at a constant rate

Question 2

The motion of a particle is described in the velocity versus time graph shown in the figure. We can say that its speed

A) increases.
B) decreases.
C) increases and then decreases.
D) decreases and then increases.