Choose the correct statement.

(I) Work done is negative when the force acts opposite to the direction of displacement.

(II) Work done is positive when the force is in the direction of displacement.

The work done on an object is said to be positive when the object displaces in the direction of applied force while if the object displaces in the opposite direction of applied force and it is negative.

For example, when the box is pushed horizontally, it moves forward hence the work done here on the box is positive. Now, consider the same box being lifted in the upward direction, it moves against the gravity. It represents negative work is done on the box.