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Shown plane mirror is lying in y-z plane...

Shown plane mirror is lying in y-z plane. A particle P has velocity `vecu = 5hati + 6 hatj` at t=0 & acceleration `veca =2thatj`. Velocity of its image at t=2s relative to it is

A

`10hati`

B

`-10hati`

C

`20hatj`

D

`-20hatj`

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(I) = 2v_(M) - v_(0)`
= ` 2 xx 0 - (5 hati + (6+ 2t)hatj)`
`v_(I)= -5hati + 10 hatj , v_(10) = v_(I) - v_(0)`
hence `v_(Io) = -5hati + 10 hatj - (5 hati + 10hatj)`
[ at t= 2 sec] = `-10hati`
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