Two bodies A and B are travelling with constant velocities of 20m/s and 30m/s in the same positive direction. The relative velocity of A with respect B is
A
10m/s
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B
−10m/s
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C
30m/s
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D
50m/s
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Solution
The correct option is B−10m/s Let vA and vB be the velocities of body A and B.
Relative velocity of A w.r.t B, vAB=vA−vB=20−30=−10m/s