Question

Work done is said to be positive when a force causes displacement:

• A. in its own direction
• B. in the direction opposite to the applied force
• C. in the direction at right angles to the direction of applied force
• D. none of the above

Answer 1

The correct option is A in its own direction

Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.