124k views
5 votes
In which situation is work not being done?

User Jkalivas
by
8.1k points

2 Answers

6 votes

Answer: need more info

Step-by-step explanation:

User David Sanders
by
7.5k points
6 votes

AS

work done =W = F.d = F d cosФ (Ф is angle between force F and displacement d) If a body/object is moving on a smooth surface (friction-less surface ) .There is no force acting on that body. F=0 so W=FdcosФ= (0)dcosФW=0

Now if a body is facing some amount of force but under the action of force there is no displacement covered. d=0 so W =FdcosФ= F(0)cosФW=0

example: A person is applying a force on rigid wall but wall remains at rest there is no displacement occurs in wall.

The third term upon which work done dependent is angle between force and displacement i.e Ф. If Ф=90° then W= FdcosФ= Fdcos90W=0 ( as cos 90°=0)

In which situation is work not being done?-example-1
User Schoel
by
8.2k points