What is meant by path length? 

 What is displacement? 

What is meant by uniform motion?

What is the position - time graph?

Define average velocity.

Define average speed.

Define instantaneous velocity of a body in terms of its average velocity.

The average velocity of a body is equal to its instantaneous velocity. What do you conclude by this?

What does the slope of position - time graph represent?

Define average acceleration

Define instantaneous acceleration of a body in terms of its average acceleration.