Mechanical Systems - #1

Any device that helps us do work is called.

• A producer

• A machine

• A blessing

• A contraption

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NGSS.MS-PS3-3

Machines support many humans needs. Provide an example of a human need from the past that was met by a machine.

The 6 simple machines are...

• Lever, nail, screw, pulley, wedge, wheel & axle

• Hammer, inclined plane, screw, pulley, nail, wheel & axle

• Lever, inclined plane, screw, pulley, wedge, wheel & axle

• Inclined plane, diamond, pulley, wedge, metal, wheel & axle

Provide an example of a simple machine in real life and explain its function.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is a complex machine?

A system is a group of parts that work together to perform a function.

• True

• False

Each subsystem in a complex machine contains a simple machine and usually has just one function. List 2 examples of a subsystem on a pedal bike.

The mechanical advantage of a machine is the amount by which a machine can multiply a force.

• True

• False

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NGSS.MS-ETS1-1

The force applied to a machine is called the output force. Example: a human pushing down on a lever.

• True

• False

Input and output forces are measured in...

• Grams

• Pounds

• Newtons

• Joules