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Q.

An object moves with velocity v→0=10i^+j−2k in front of a plane mirror moving with velocity V→M=−5j^.Plane of the mirror is parallel o the xy plane with its reflecting surface facing the positive z axis. The velocity  of the image is :

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a

5i^+j^−2k^

b

10i^+j^+2k^

c

15i^+j^−2k^

d

10i^+j^−2k^

answer is B.

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Detailed Solution

V→O/M=V→O−V→M=10i^ +6j^ -2k^  So VI/M→=10i^ +6j^+2k^  Therefore,VI→ =VM→+VI/M→ =10i^+j^+2k^
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