Work and Power

Front

What is the definition of work in physics?

Back

Work is done when a force is applied to an object and the object moves in the direction of the force.

Front

Which of the following is an example of work being done?

Back

Lifting a box.

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 the context of physics?

Back

Power is the rate at which work is done or energy is transformed.

Front

What is the unit of power?

Back

The unit of power is the Watt (W).

Front

How is power calculated?

Back

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

Front

If you push a cart with a force of 60 N for 2 m, how much work have you done?

Back

120 J.

Front

True or False: You do work only when you exert a force on an object and move it.

Back

True.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

What is the SI unit of work?

Back

The SI unit of work is the Joule (J).