4) displacement be zero even when distance is not zero
this is because if the body comes back to original place..then the shortest distance covered is 0.
So it is ZERO. Whereas distance is path traveeled by body it never be 0
5) Displacment is 0 as it reaches initial point again.
Distance =half the perimeter +diameter
22/7*14 + 2 ×14
Taking distance on Y axis and Time on X -axis gives u dDistance and time graph