A book is pushed with a constant force of 1 N. It displaces 1 m in the direction of the force. The work done by the force is:

Question

Question

This question was previously asked in

RRB Technician Grade III Official Paper (Held On: 29 Dec, 2024 Shift 3)

Answer 1

The correct answer is +1 J.

Key Points

Work Done is defined as the product of the force applied and the displacement in the direction of the force.
The formula for work done is W = F × d, where W is the work done, F is the force, and d is the displacement.
In this case, the force (F) is 1 N and the displacement (d) is 1 m.
Therefore, the work done (W) is 1 N × 1 m = 1 J.
The positive sign indicates that the force and the displacement are in the same direction.

Additional Information

Negative Work Done
- Negative work occurs when the force and the displacement are in opposite directions.
- In such cases, the work done is calculated as -F × d.
- This situation typically occurs in scenarios involving friction or opposing forces.
Zero Work Done
- Zero work is done when either the force is zero, or the displacement is zero, or the force is perpendicular to the direction of displacement.
- In mathematical terms, this can be expressed as W = 0.