Topic 1 & 2 Levers, Inclined Planes, Wheel & Axle, Gears, & Pulleys
Topic 3 & 4 Energy, Friction, & Efficiency, Force, Pressure, and Area
Topic 5 & 6 Hydraulics, Pneumatics, & Combining Systems
Topic 7 & 8 Machines Throughout History, and People and Machines
Problem Solving, & Formulas
100
What is the distance between the fulcrum and effort force called?
What is the effort arm.
100

Can you name one way you can reduce friction?

Lubricants such as oil or grease can reduce friction.

100

Give two examples of pneumatic systems.

A Jackhammer, Dentist's drill, Nail gun, etc.

100

In 150 B.C. this Egyptian made a pre-cursor to the steam engine

Who is Hero of Alexandria.

100

What is the formula for pressure?

Pressure=Force/Area

200
What is the correct order for a Class 3 lever? A.) Effort-Load-Force B.) Load-Effort-Force C.) Load-Force-Effort
B.) Load-Effort-Force
200

What type of energy is stored within the bonds of compounds in food?

What is chemical energy.

200

Give two examples of Hydraulic systems.

A tractor, backhoe, bulldozer, etc.

200

James Watt developed the steam engine which burned THIS to produce the steam

What is coal

200

What is the formula and unit for work?

Work=Force x Distance

Work is measured in Joules.

300
A __________ consists of a small cylinder and crank or handle.
A winch
300

What is another name for stored energy?

Which is potential energy.

300

What do you call multiple simple machines that are a part of a large system?

A subsystem.

300

Would you consider the steam engine a hydraulic or pneumatic machine?

A pneumatic machine... the gas/steam is released!

300

The input force applied to a hydraulic system was 20N, the input piston has an area of 2m2. The output piston has to lift a load of 60N. 

In order to figure out the area of the output piston, what do you need to assume?

Input pressure = output pressure 

Pascal's Law

400
Fill in the blanks: Mechanical Advantage is the comparison of the force ______ by the machine to the force ________ to the machine.
Mechanical Advantage is the comparison of the force produced by the machine to the force applied to the machine.
400

State Pascal's law.

Pascal's law states that pressure exerted on a contained fluid is transmitted undiminished throughout the fluid and perpendicular to the walls of the container.

400

Can you name two different simple machines?

A pulley, lever, etc.

400

In an internal combustion engine what is the phase called when the gas is ignited?

What is the combustion/power stroke

400

What is the formula for Mechanical Advantage?

MA=Load Force/Effort Force

500
A gear with teeth that fit into the links of a chain is called a _________.
What is a sprocket.
500

Energy in motion is also known as _____________.

Kinetic Mechanical Energy

500

Why are hydraulic machines so efficient?

Work input = Work output because hydraulics use oil which reduces friction. 

500

Can you define ergonomics?

The science science of designing home or work places that best suit humans.

500

How do you calculate the efficiency of a lever?

Efficiency=Work done by the lever on load/Work done on lever by effort force times 100%

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