What is a machine defined as in the context provided?

• A device that uses energy to perform magic

• Any device that uses energy to do work

• A tool used exclusively for lifting weights

• An electronic device that simplifies human tasks

How is work defined scientifically?

• A task completed by a machine

• Force exerted over a distance

• Energy required to power a machine

• The outcome of a machine's operation

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the mechanical advantage?

• The ratio between the input force and the output force

• The speed at which a machine can do work

• The distance a machine can move an object

• The amount of energy saved by using a machine

Which of the following is NOT listed as a simple machine?

• Wedge

• Pulley

• Gear

• Lever

What does a lever consist of?

• A wheel and an axle

• A fulcrum and an arm

• A screw and a nail

• A slope and a base

What is efficiency in the context of simple machines?

• The ability to do work without any energy loss

• When the input work and the output work are identical

• The speed at which a machine completes a task

• The durability of a machine over time

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NGSS.MS-ETS1-1

Why might adding a simple machine result in doing more work?

• Because it makes the task more complex

• Because it changes the direction or magnitude of the force

• Because it increases the force needed

• Because it requires electricity to operate

Tags

NGSS.MS-ETS1-1

What is the result of using an inclined plane to lift a weight?

• Decreased efficiency due to energy loss

• Decreased distance but increased force

• Increased distance but decreased force

• Increased speed of lifting

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NGSS.MS-PS2-4

What does the mechanical advantage of less than 1 signify?

• The machine can lift heavier weights

• The machine can increase the distance of force application

• The machine requires no input energy

• The machine is 100% efficient