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A motor car A is travelling with a veloc...

`A` motor car `A` is travelling with a velocity of `20m//s` in the north-west direction and another motor car `B` is travelling with a velocity of `15m//s` in the north-east directions.The magnitude of relative velocity of `B` with respect to `A` is.

A

`25 m//s`

B

`15 m//s`

C

`20 m//s`

D

`35 m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
`vecV_(A)=-20/sqrt2hati+20/sqrt2hatj,vecV_(B)=15/sqrt2+15/sqrt2hatj,vecV_(AB)=vecV_(A)-vecV_(B)`
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