Work, Power and Energy

Front

What is Work in physics?

Back

Work is defined as the product of force and displacement in the direction of the force. It is measured in joules (J).

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), where 1 W = 1 J/s.

Front

How is Work calculated?

Back

Work (W) = Force (F) × Displacement (d) × cos(θ), where θ is the angle between the force and displacement.

Front

What is the formula for calculating Power?

Back

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

Front

What is the relationship between Work, Power, and Time?

Back

Power is the amount of work done per unit of time. More power means more work done in less time.

Front

How do you convert watts to joules?

Back

1 watt is equal to 1 joule per second. To find joules, multiply watts by time in seconds.

Front

What is the unit of Work?

Back

The unit of Work is the joule (J).

Front

What is the unit of Power?

Back

The unit of Power is the watt (W).

Front

If a force of 10 N moves an object 5 m, how much work is done?

Back

Work = Force × Displacement = 10 N × 5 m = 50 J.

Front

If a machine does 200 J of work in 4 seconds, what is its power?

Back

Power = Work / Time = 200 J / 4 s = 50 W.