Physics

Problem

Three identical blocks are pulled on a smooth horizontal surface by a

10\,\text{N}

force for a distance of

2\,\text{m}

. Case P: the force is along the displacement. Case Q: the force makes an angle of

60^\circ

with the displacement. Case R: the force makes an angle of

120^\circ

with the displacement. Arrange the cases P, Q and R in descending order of the work done by the force.