Question

define work discuss about positive, negative or no work done

Answer 1

Work =force x displacement
When the direction of displacement is along the direction of force it is positive work
When opposite to the direction of force it is negative work for

When force acts perpendicularly to the direction of displacement
Or when no force acts on a body
Or the displacement. Is zero
it is called zero work

Answer 2

Hey!

______________________

Work down by a force acting on an object is equal to the product of force and the displacement of object in the direction of the object.
Work done = Force × Displacement

SI unit of work done - joules (J)

• Work done by a force is positive when the force acts in the same direction as that of displacement.

•Work done is negative when force acts opposite to the direction of the displacement.

• Work done is zero if there is no displacement in the direction of force , that is, force perpendicular to displacement, also if there is no displacement, work done is zero.


______________________

Hope it helps...!!!