Question

5.In which of the situation is work done.
(5 Point)

pushing a tree
lifting a bag

6.In science mental activity is not consider as a work.
(5 Point)

True
False

Answer 1

Answer:

Work done is defined by: w = F × displacement where F is force applied.On smooth floor frictional force is zero,therefore work done is zero.

Answer 2

Answer:

5. lifting a bag

6. True because science consider that a body is moving then the work is done