Why work done against the gravity is negative? [2 MARKS]
When is work said to be done against the force of gravity?
(a) When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
(b) How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?