Work and Power

Front

What is work in physics?

Back

Work is defined as the product of the force applied to an object and the distance the object moves in the direction of the force. It is measured in joules (J).

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is measured in watts (W).

Front

What is the formula for calculating power?

Back

Power (P) = Work (W) / Time (t).

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy. When work is done, energy is transferred to or from the object.

Front

What is the unit of work?

Back

The unit of work is the joule (J), which is equivalent to one newton-meter (N·m).

Front

What is an example of work being done?

Back

Lifting a box is an example of work being done because the box moves in the direction of the applied force.

Front

True or False: If no movement occurs, work is done.

Back

False. If there is no movement, then no work is done.

Front

What happens to power if you increase work and decrease time?

Back

If you increase work and decrease time, you will have more power.

Front

What is the significance of the angle in the work formula?

Back

The angle (θ) in the work formula determines how much of the force contributes to the work done. If θ is 0°, all the force contributes to work; if θ is 90°, no work is done.