A constant force F acts on a moving body...

A constant force F acts on a moving body along a smooth quarter circular arc of radius R fixed on horizontal surface. Calculate the work done by force F from A to B

If force F always points towards B then work `Fsqrt(2)R`

IF force F always acts tangentially `(Frpi)/2`

If force F always acts parallel to AB `Fsqrt(2)R`

If force F always acts parallel to AB zero

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The correct Answer is:

A, B

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