1. Define work. Give its S.I unit. Write an expression for positive work done.
2. Calculate the work done in pushing a cart through a distance of 50 m against the force of friction equal to 250 N. Also state the type of work done.
3. What will be the work done, if displacement of the object is perpendicular to the directions of force.
4. When person moves on a circular path and reached to the same point from where he starts, then what will be the work done?