A sledge weighing 30 kg is pulled with a rope that makes 60° with the horizontal. The tension on the rope is constant and it is 37N. The sledge is moved horizontally for 13 m. There is no friction and cos(60°)=0.5

Question

a) What is the work done by the tension on the sledge in Joules?
b) Define work.
c) The above was an example of a solid block doing work. Gases can also do work. Describe a situation where this is possible.