Under what condition will the displacement and distance have the same magnitude ?

An object is moving with uniform speed in a circle of radius $7\, m .$ Calculate the distance and displacement when it completes half the circle. What type does the object possess ?

Name a physical quantity that essentially changes as a body moves.

What can you say about the motion of an object whose distance time graph is

$(i)$ a straight line, parallel to the time axis ?

$(ii)$ a straight line passing through the origin making an angle with the time axis ?

The velocity-time graph of cars $A$ and $B$ which start from the same place and move along a straight road in the same direction is shown below

Calculate :

$(a)$ the acceleration of car $B$ between $2 \,s$ and $4\, s$.

$(b)$ the time at which both the cars have the same velocity.

$(c)$ the distance travelled by the two cars $A$ and $B$ in $8\, s$

$(d)$ Which of the two cars is ahead after $8\, s$ and by how much ?

Give an example of an accelerated body, moving with a uniform speed.