Positive, Negative and Zero Work

Front

Work done by frictional force on a body

Back

Negative

Front

Work done by gravitational force on a body thrown up.

Back

Negative

Front

Work done by gravitational force on a body falling down freely.

Back

Positive

Front

Work done by a man standing with a load on his head.

Back

Zero

Front

Work done by a man walking with a load on his head

Back

Zero

Front

Work done by a man when lifting a body up.

Back

Positive

Front

Work done by normal force on a book pushed on a table.

Back

Zero

Front

Work done when you raise a load up with the help of a Pulley

Back

Negative

Front

Work done by a person pushing a stationary wall.

Back

Zero

Front

Work done when a weight is lifted vertically at constant speed.

Back

Positive