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A point moves in xy-plane according to e...

A point moves in xy-plane according to equation x = at, y = at (l - bt) where a and b are positive constants and t is time. The instant at which velocity vector is at `pi//4` with acceleration vector is given by:

A

`(1/a)`

B

`(1/b)`

C

`(1/a+1/b)`

D

`(a+b)/(a^(2)+b^(2))`

Text Solution

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The correct Answer is:
B
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