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Man A sitting in a car moving with 54km/...

Man `A` sitting in a car moving with `54km//hr` observes man `B` in front of car crossing perpendicular the road of width `15m` in `3s`

A

`5sqrt(10)` towards the carm at some angle

B

`5sqrt(10)` away from the car at some angle

C

`5` perpendicular to the road

D

`15` along the road

Text Solution

Verified by Experts

The correct Answer is:
B
Velocity of `A` and velocity of `B` relative to `A` are as shown
`:. Vec(V)_(B) = vec(V)_(BA) + vec(V)_(A)`
`rArr V_(0)=sqrt(5^(2)+15^(2))=5 sqrt(10)`

and direction of `vec(V)_(B)` is away from `vec(V)_(B)`.
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