$(a)$ Define uniform circular motion.

$(b)$ Ram goes for a morning walk in a circular park daily. He completes one revolution of the park in $4$ minutes. Find his speed if the diameter of the park is $420\, m$.

$(c)$ Draw velocity$-$time graph for uniform motion along a straight line. How can you find distance covered by a body from this graph ?

$(a)$ Write differences between speed and velocity.

$(b)$ The speed of a moving object is $x m s ^{-1}$. Its velocity is $y m s ^{-1}$. What is the similarity observed ?

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

$(i)$ What can be depicted from the graph regarding the motion of the object ?

$(ii)$ Find the value of acceleration from the graph.

Give an example of a body which covers a certain distance, but its displacement is zero