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 over which that force is applied, 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 unit of work?

Back

The unit of work is the Joule (J).

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object. Energy can be transferred or transformed but cannot be created or destroyed.

Front

What happens when the force applied is in the opposite direction of motion?

Back

Negative work is done when the direction of the applied force is anti-parallel (opposite) to the direction of motion.

Front

If no displacement occurs, what can be said about the work done?

Back

If there is no displacement, then no work is done, regardless of the force applied.

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 90 degrees, no work is done.

Front

How do you calculate the distance moved if work and force are known?

Back

Distance (d) = Work (W) / Force (F).