Work, Power, & Machines Quiz

What is the definition of work?

• Using a force to move an object a distance

• Holding an object in place

• Changing the direction of an object

• Applying a force to an object

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

• Mowing the lawn

• Hanging from a chin-up bar

• Pushing against a locked door

• Swinging a golf club

What is the unit used to measure work and energy?

• Joule

• Watt

• Newton

• Kilogram

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

• 5 Joules

• 10 Joules

• 15 Joules

• 50 Joules

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What is power?

• The amount of work done per unit time

• The force applied to an object

• The distance an object is moved

• The direction in which a force is applied

Who is the unit of power named after?

• James Prescott Joule

• James Watt

• Isaac Newton

• Albert Einstein

What is the formula to calculate power?

• Power = Work / Time

• Power = Force x Distance

• Power = Mass x Acceleration

• Power = Energy / Time

What is the mechanical advantage of a lever?

• The number of times a machine multiplies the input force

• The distance an object is moved by a machine

• The direction in which a machine moves

• The efficiency of a machine

What is the purpose of a wedge?

• To change the direction of a force

• To multiply the effort force

• To move an object in a circular motion

• To split or separate objects

Can a compound machine produce more work output than work input?

• Yes

• No

• It depends on the specific machine

• Not enough information to determine

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