Work and Power Assessment 2025-Wheeler

Which definition defines the meaning of work for science?

• you apply a forece to an object.
• an object is moving after you aplly a force to it.
• you exert a force that moves and object in the same direction of the force.

Which of the following items would cause a change in the output of work a machine is able to produce?

• All machines have a mechanical advantage.
• Some of the work done is used to overcome friction.
• The machine cannot work as hard as a person.

_______________ is the unit used for the measurement of work.

• Joule
• Newton
• Watt

What is the relationship between power and work?

• Power is the total amount of work done.
• Power is the rate at which work is done.
• Power is the total amount of energy consumed.

Which of the following answers would be the reason someone would use a simple machine?

• work faster

• Remove friction.

• using less force

• using more energy

Which formula would I use to calculate the amount of work being done?

• work = force x distance
• work = force / distance
• work = distance/ force

In which situation is a person doing work on an object?

• Jack picked up a rock and placed it in the bucket.

• John hit the nail with hammer over and over but it would not move.

• Sally and Lisa held mom's groceries while she checked out.

• The dog carried the bone in his mouth all day.

What is the unit used for power?

• Newton
• Gram
• Watt

A simple machine is a fundamental device that makes work eaier by changing the _____________ or ______________ of a force used to do the work.

• time or swiftness
• energy or progress
• direction or magnitude

A man applies a force of 325 N to push a truck 13 m down the street. How much work has been done?

• 50 J
• 42 J

• 422 J

• 4,225 J