When is work done by the force positive ?

When is work done by a force postivie ?

When is work done by a force zero ?

When is work done by a force negative ?

When is the work done by a force is positive and when is it negative ?

When is the work done by a force is positive and negative ?

State the conditions under which the work done by a force is positive or negative.

State the condition when the work done by a force is (a) positive ,(b)negative Explain with the help of exapmples.

When is the work done by a force zero?