A body moves on three quarters of a circle of radius $r .$ The displacement and distance travelled by it are
A body moves on three quarters of a circle of radius $r .$ The displacement and distance travelled by it are
- A
displacement $=r,$ distance $=3 r$
- B
distance $=2 r,$ displacement $=\frac{3 \pi r}{2}$
- C
displacement $=\sqrt{2} r,$ distance $=\frac{3 \pi r}{2}$
- D
displacement $=0,$ distance $=\frac{3 \pi r}{2}$
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$(ii)$ How long was it stationary ?
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