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Question
A particle is moving in a circular path of radius r. The displacement after half a circle would be :
Options
0
`pir`
2r
`2pir`
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Solution
2r
Displacement is the difference between the final and initial position of a body. It is a vector quantity and is independent of the path taken. So, for the movement of half of a circle, the displacement is 2r, where r is the radius of the circular path.
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| S.No | First Move | Seconde Move | Distance (m) | Displacement |
| 1. | Move 4 metres east | Move 2 metres west | 6 | 2 m east |
| 2. | Move 4 metres north | Move 2 metres south | ||
| 3. | Move 2 metres east | Move 4 metres west | ||
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| 5. | Move 5 metres south | Move 2 metres north | ||
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