Question

Pick the correct option(s) representing the unit of work.

• A. Joule
• B. Newton-metre
• C. Watt
• D. Metre per second

Answer 1

Answer: (A), (B)

The correct options are
A

Joule

B

Newton-metre

The amount of work done by a force is the product of force and displacement of the point of application of force in the direction of the force.
The S.I unit of work is joule, which is abbreviated as J.
Since, $\text{work}=\text{force}\times \text{displacement}$ $\therefore 1\text{joule}=1\text{newton}\times 1\text{metre}$.
Thus, 1 joule of work is said to be done when a force of 1 newton displaces a body through a distance of 1 metre in the direction of force.