Advantages of Simple Machines

A(n) _____is any device that makes doing something easier.

• appliance
• machine
• gadget

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NGSS.K-2-ETS1-1

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Why do all machines involve some kind of motion?

• Machines only work when they are stationary.
• Motion is irrelevant to the function of machines.
• All machines are designed to remain still.
• All machines involve some kind of motion to perform work and manipulate energy.

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NGSS.MS-PS3-1

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Although a machine makes doing work easier, it does not _____the amount of work required.

• eliminate
• simplify
• reduce
• increase

A machine _____the way in which work is done.

• simplifies
• changes
• removes
• complicates

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NGSS.MS-ETS1-1

To use a machine, you must apply a(n) ___to it.

• weight
• speed
• energy
• force

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NGSS.MS-PS2-1

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When a hammer removes a nail, the ______ comes from pulling on the hammer's handle.

• angle
• input force

• speed
• weight

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NGSS.MS-PS2-2

A hammer changes the force to what kind of force when it pulls the nail from the board?

• frictional force
• output force

• input force

• gravitational force

If the input distance is increased in a single-pulley system, what else increases?

• Load distance increases.
• Pulley speed increases.
• Load weight decreases.
• Friction in the system decreases.

When you use a machine, the input force makes part of the machine ____?

• consume energy without output
• move or perform work
• break down or malfunction
• stay stationary and idle

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NGSS.MS-PS3-5

A machine can make work easier in what ways?

• A machine makes work easier by reducing effort, increasing efficiency, and enhancing precision.
• A machine enhances creativity by generating ideas.
• A machine decreases productivity by slowing down processes.
• A machine makes work harder by increasing fatigue.