Work and Power Problems

Front

What is the formula for work?

Back

Work = force x distance

Front

A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?

Back

900 J

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

If F=200 N and d=50 m, what is the work done?

Back

10,000 J

Front

What is the relationship between Power and Work?

Back

Power is the rate at which Work is done.

Front

Define Power in the context of work.

Back

Power is the amount of work done per unit of time.

Front

What is the unit of work in the International System of Units (SI)?

Back

Joule (J)

Front

How do you calculate power if you know work and time?

Back

Power = Work / Time

Front

What is the work done when a force is applied at an angle?

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 significance of the angle in work calculations?

Back

The angle affects the effective component of the force that does work.