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The potential energy for a force filed v...

The potential energy for a force filed `vecF` is given by `U(x,y)=cos(x+y)`. The force acting on a particle at position given by coordinates `(0, pi//4)` is

A

`-1/sqrt2(hati+hatj)`

B

`1/sqrt2(hati+hatj)`

C

`(1/2hati+(sqrt3)/2hatj)`

D

`(1/2hati-(sqrt3)/2hatj)`

Text Solution

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The correct Answer is:
B
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