Work and Power

Front

What is the definition of work in physics?

Back

Work is defined as the measure of energy transfer that occurs when an object is moved over a distance by an external force. It is calculated as the product of the force applied and the distance moved in the direction of the force.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Front

How is power defined in relation to work?

Back

Power is defined as the rate at which work is done or energy is transferred over time. It is calculated as the amount of work done divided by the time taken to do that work.

Front

What is the formula for calculating work?

Back

The formula for calculating work is W = F × d, where W is work, F is the force applied, and d is the distance moved in the direction of the force.

Front

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

Back

The unit of work in the SI system is the joule (J). One joule is defined as the work done when a force of one newton displaces an object by one meter.

Front

What is the relationship between work, force, and distance?

Back

Work is directly proportional to both the force applied and the distance over which the force is applied. If either the force or the distance increases, the work done also increases.

Front

How do you calculate power if you know the work done and the time taken?

Back

Power can be calculated using the formula P = W / t, where P is power, W is work done, and t is the time taken.

Front

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

Back

The unit of power in the SI system is the watt (W). One watt is defined as one joule of work done per second.

Front

If a force of 10 N is applied to move an object 5 m, how much work is done?

Back

The work done is calculated as W = F × d = 10 N × 5 m = 50 J.

Front

What is the significance of one joule in terms of force and distance?

Back

One joule is the amount of work done when a force of one newton is applied to move an object one meter in the direction of the force.

Front

How can you determine the distance moved if you know the work done and the force applied?

Back

You can determine the distance moved using the formula d = W / F, where d is distance, W is work done, and F is the force applied.