What is the amount of work done in the following cases?Justify your answer by giving appropiate reason

a) by an electron revolving in a circular orbit of radiusr around a nucleus.

b) By the force of gravity when a stone of mass m is dropped from the top of a multi storeyed building of height h

(a) Work done by electron in a complete rotation is zero because displacement of electron is zero.

(b) Work done by the force of gravity = force * displacement in the direction of force

 = mg *h

=mgh

  • 7

in a the work is 0 beacause there is no displacemet

  • 5

No in "a" it is zero because the force of attraction acts perpendicular to the displacement.

in "b"....i dont know

  • 2
What are you looking for?