Question

A person is trying to push a car uphill. But he starts sliding backward along with car, work done by the person on the car is

• A. Positive
• B. Negative
• C. Zero
• D. None of these

Answer 1

The correct option is B

Negative

Since the force applied by the person and the displacement of the car is in opposite direction. Net work done by the person is Negative. $\theta$ = ${180}^{\circ }$​

Work done = Force × Displacement $\times$ $\cos$ $\theta$

Work done = Force × Displacement $\times$ $\cos$ ${180}^{\circ }$​​

Work done = (-) Force $\times$ Displacement