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An object A is moving with 5 m/s and B i...

An object A is moving with 5 m/s and B is moving with 20 m/s in the same direction. (Positive x-axis). Find a) velocity of B relative to A.
b) Velocity of A relative to B

Text Solution

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(a)`vecV_(B)=20hat(i)"m/s" , vecV_(A)=5hat(i)"m/s",`
`vecV_(B)-vecV_(A) = 15hat(i)`m/s
`vecV_(B)=20hat(i)"m/s", vecV_(A)=5hat(i)`m/s,
`vecV_(AB)=vecV_(A)-vec_(B)=-15hat(i)`m/s
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