Question

sir,pleaze give me 05 example of positive ,negative ,zero work done.

Answer 1

possitive:
1.pushing a book on the table to a distance
2.lifting a bucket of water
3.polling a box to another place on the floor
4.climbing a tree 
5.kicking a football

negative:
1.work done by frictional force on that book
2. work done by gravitational force on that buccket while          pulling it
3.work done by gravitational force on the object that was    climbing the tree
4.work done by the frictional force while kicking

o work done
1.pushing the wall
2.moving a book horizantally on the tabel
3.walking horizantally on the road
4. object in circular motion
5.try to move a heavier object which does not move