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A car A moves with velocity 15 m s^(-1) ...

A car `A` moves with velocity `15 m s^(-1)` and `B` with velocity `20 m s^(-1)` are moving in opposite directions as shown in . Find the relative velocity of `B` w.r.t. `A` and w.r.t. `B`.
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Text Solution

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Here also let us assume right directionis positive, then left direction will be negative.
Given: `v_(A)=-15 ms^(-1), v_(B)=20 m s^(-1)`
Relative velocity of `B` w.r.t `A`:
`v_(A//B)=v_(A)-v_(B)=-15-20=-35 ms^(-1)`
(Negative sign indicates that this relative velocity is in back ward direction.)
Hence the separation between `A` and `B` is increasing with time,
hence velocity of separation is `35 m s^(-1)`.
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