teacher: Concept 4: Work and Power Calculations Test

Front

What is the formula for calculating work?

Back

W = F * d, where W is work, F is force, and d is distance.

Front

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

Back

The unit of work is the Joule (J).

Front

How is power defined in physics?

Back

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

Front

What is the formula for calculating power?

Back

P = W / t, where P is power, W is work, and t is time.

Front

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

Back

The unit of power is the Watt (W).

Front

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

Back

W = F * d = 10 N * 5 m = 50 J.

Front

If 200 J of work is done in 10 seconds, what is the power used?

Back

P = W / t = 200 J / 10 s = 20 W.

Front

What is the relationship between work, power, and time?

Back

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

Front

If a force of 50 N is applied to lift an object and 100 J of work is done, how high was the object lifted?

Back

d = W / F = 100 J / 50 N = 2 m.

Front

What does it mean if an object is doing work?

Back

It means that a force is causing the object to move in the direction of the force.