Answer to Question #138426 in Electricity and Magnetism for Omar

Question

Calculate the work ∆W required to move the cart along the circular path from point A to point
B if the force field is F = 3xyax + 4xay.

Answer 1

Solution

If F is force acting on moving body

Then work done is given

$W=F.dr$

But in case of circular path cart is moving in it then acting force and displacement vector are always perpendicular to each other therefore total work done is zero.

$\Delta W=0$