Question

Give an example: a)In Which a force does negative work b) In which a force does negative work.​

Answer 1

Answer:

Explanation:a)pulling a box on head

In this case weight is downward and force is upward

Answer 2

Answer:

frictional force

Explanation:

frictional force in more cases acts oppostie from the motion of body on rough surface...thus making an angle of 180 degree...as we know W = FScos theta

also cos 180 is negative thus making work done by body as negative