Advantages Simple Machines Picture This Compound Machines.

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Presentation transcript:

Advantages

Simple Machines

Picture This

Compound Machines

Anything Goes

Advantages Simple Machines Picture This Compound Machines Anything Goes

Pulley type with a mechanical advantage of 1.

What is a fixed pulley ?

Force equal to the weight of the object that is moved.

What is output force?

There are no final units to measure this.

What is mechanical advantage?

Mechanical advantage of a pulley system.

What is more than 2?

Mechanical advantage is output force divided by what?

What is input force?

Flat, slanted surface

What is an incline plane?

The closer these are together on a screw, the greater the mechanical advantage.

What are threads?

Rakes, brooms, and fishing poles are all in this lever class.

What are third class levers?

Second class levers have this in the center position.

What is the output force?

24 meters 3 meters Ideal mechanical advantage of ramp.

What is 8 ?

What is an inclined plane?

What is a pulley?

What is a wedge?

What is a lever?

What is a screw?

The Delorean car may have been “back to the future” but its doors are still in this class.

What is a second class lever?

Three simple machines found on a can opener.

What are gears (wheel & axel), lever, and wedge?

To find the mechanical advantage of a compound machine you must know this.

What are the mechanical advantages of all of the simple machines in it?

This compound machine is made of a wedge and a lever of this class.

What is first class lever?

The two simple machines found in your mouth.

What are wedge and lever?

This reduces the efficiency in any machine.

What is friction?

Name and locate four simple machines in a car.

What are incline plane (windshield), lever (door), wheel & axel (tires), gears (inside car), screws (inside car)?

This is caused by friction in a machine.

What is thermal energy?

In the absence of friction machines have this efficiency.

What is 100%?

The type of energy that machines convert.

What is mechanical energy?

Final Jeopardy

Efficiency

A can opener requires 2,400 J of input work and gives 1,750 J of output work. What is its efficiency? Round to whole number.

What is 73% ?