2022 GENERAL SCIENCE 1 (CONTENT)

When you push an object with Force, and it moves a certain distance, then it is claimed that you have done some work.  

If force is applied to an object but it can not move an inch, then work is not done at all.

Exercise:

Suppose a force of 4 N is applied to an object which causes  it to move 5 m. in the direction of the force.  i) How much is  the work done? 

                 ii) How much is  the energy changed while pushing?

Answer:   i) Work done = Force x distance. W= F x d = 4N x 5m = 20J.

               ii) Energy changes = 20 J