What is the nature of the displacement$-$time graph of a body moving with constant velocity ?

What does the slope of a displacement$-$time graph represent ? Can displacement$-$time sketch be parallel to the displacement axis ? Give reason to your answer.

A cheetah can accelerate from rest at the rate of $4 m s^{-2}$

$(i)$ What will be the velocity attained by it in $10\, s$ ?

$(ii)$ How far will it travel in this duration ?

List two differences in tabular form between speed and velocity. When is a body said to have :
$(a)$ uniform velocity and $(b)$ variable velocity. How is the average velocity of a body is calculated when its velocity changes at a non$-$uniform rate ?

A frog hops along a straight line path from point $'A^{\prime}$ to point ${ }^{\prime} B ^{\prime}$ in $10\, s$ and then turns and hops to point ${ }^{\prime} C^{\prime}$ in another $5\, s$. Calculate the average speed and average velocity of the frog for the motion between $(a)(A)$ to $(B)(b)(A)$ to $(C)($ through $B)$

What conclusion can you draw from the displacement$-$time graph of a body as shown below ?