Work, Simple Machines, and Mechanical Advantage

How do you know when a force has been applied to an object?

• It moves.
• It flies.
• It accelerates.
• It gets bigger.

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NGSS.MS-PS2-2

Newtons are the correct unit for which of the following?

• Force

• Work

• Power

• Acceleration

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NGSS.HS-PS2-1

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

• power
• work
• momentum
• Watt

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NGSS.MS-PS3-5

Which is the correct unit for work?

• Joules

• Newton

• meter

• Watts

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NGSS.MS-PS3-4

1. A book weighing 1.0 newton is lifted 2 meters.  How much work was done?

• 2 J
• 0.5 J

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NGSS.MS-PS3-5

A kid throws a ball with a force of 70N over 1.1 meters. How much work did he do?

• 77 joules
• 70 joules
• 7.7 joules
• 11 joules

It took 500 Newtons of force to push a car four meters. How much work was done?

• 2000 J

• 125 J

• 0.008 J

• 500 J

Tags

NGSS.MS-PS2-2

All of these are examples of a wheel and axle except:

• pizza cutter
• doorknob
• windmill
• lever

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NGSS.MS-PS2-1

To increase the mechanical advantage of a lever

• make sure the fulcrum is in the middle of the lever
• move the fulcrum closer to the load
• move the fulcrum closer to the effort
• use a bigger fulcrum

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NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

A simple machine usually used to raise a flag is a (an)

• inclined plane

• pulley

• lever

• wheel and axle

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NGSS.3-5-ETS1-2