Work and Power

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

Any device that makes work easier is called a ______________________.

• Joule 
• prop
• lever
• machine

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A force exerted over a distance to move an object is ______________________.

• power
• work
• momentum
• Watt

A simple machine with a straight slanted surface is a(n) __________________. 

• lever
• wheel and axle
• inclined plane
• pulley

Which of the following is the best example of work being done.

• doing homework

• lifting a box

• pushing a stationary box

• holding a box

A 5000N block is lifted 10 m. How much work was done?

• 50000 J
• 5000 J
• 500 J
• 50 J

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If you use a crowbar to get the lid off of a bucket, what simple machine are you using?

• Inclined Plane
• Pulley
• Wheel and Axle
• Lever

How far does a car that weighs 5,000 N go if 18,000 J of work is done on it?

• 3.8 m

• 3.7 m

• 3.2 m

• 3.6 m

Tags

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The fixed point on the lever is called 

• load
• resistance
• bar
• fulcrum

The amount of work done in a certain amount of time is known as 

• work
• effort force
• resistance force 
• power