Work & Power II

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) × Distance (d) Measured in Joules (J).

Front

What is the unit of work?

Back

Joule (J) is the unit of work.

Front

What is power in terms of work?

Back

Power is the rate at which work is done. Power (P) = Work (W) / Time (t) Measured in Watts (W).

Front

How much work is done when a force of 300 N moves an object 1.5 m?

Back

Work = 300 N × 1.5 m = 450 J.

Front

If a machine does 2000 J of work in 5 seconds, what is its power output?

Back

Power = Work / Time = 2000 J / 5 s = 400 W.

Front

What does it mean when we say work is done on an object?

Back

Work is done when a force causes an object to move in the direction of the force.

Front

What is the relationship between work and energy?

Back

Work done on an object transfers energy to it, increasing its energy.

Front

What is a Newton?

Back

A Newton (N) is the unit of force in the International System of Units (SI).

Front

What is the difference between work and power?

Back

Work is the total energy transferred, while power is the rate of doing work.

Front

What is the significance of the direction of force in work?

Back

Only the component of force in the direction of motion does work.