Question

Answer it fast plzplz plz plz​

Answer 1

in case 1) work is done but in second no work is done

Answer 2

A) When student reads a book work done would be zero because there is no distance covered.

B) When earth revolves around the sun there is some work done by the earth as it covers the distance( 2*pi*r) under the influence of gravitational force.

W = F. S

Thanks