Work and Power JM

Front

What is the Law of Conservation of Energy?

Back

The mechanical energy of a system neither increases nor decreases in any process; it stays constant and is conserved.

Front

What is the relationship between Power and Work?

Back

Power is the rate at which Work is done.

Front

How do you calculate Power?

Back

Power = Work / Time.

Front

What is the unit of Power?

Back

Watt (W), which is equivalent to Joule per second.

Front

What does Work transfer in a system?

Back

Energy.

Front

What is Work in physics?

Back

Work is done when a force causes displacement of an object.

Front

What is the formula for Work?

Back

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

Front

What is the SI unit of Work?

Back

Joule (J).

Front

If 660.0 J of work is done in 3.5 seconds, what is the Power?

Back

Power = 660.0 J / 3.5 s = 189 W.

Front

What is the Work-Energy Theorem?

Back

The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy.