First slide

Rectilinear Motion

Question

A body moves along a circules track of radius ‘R’. It starts from one end of a diameter moves along the circular track and completes $1 \frac{1}{2}$ revolutions. Then the displacement is

Easy

A

$3 π$
B

3R
C

2R
D

$π R$

Solution

After $1 \frac{1}{2}$ revolutions again the particle reaches its opposite point on the circular track. Therefore the displacement =2R (Diameter, i.e separation between initial and final positions)

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