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
What transportation device uses the principle that hot air rises.
A Hot air balloon.
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 is the ultimate source of energy?
What is the sun.
200
Give two examples of Hydraulic systems.
A tractor, backhoe, bulldozer, etc.
200
What was once a very important transportation device in Canada?
The steamboat was a very important transportation device in Canada, for more than 100 years 3000 steamboats travelled along the rivers and coasts of BC and the Yukon.
200
What is the formula and unit for work?
Work=Force times Distance, 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 a simple machine that is part of a large system?
A subsystem.
300
What transportation device ran on coal?
A Steam Engine / Train.
300
What would happen when your running and there is no friction between you and the ground.
You would slip.
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
Today, huge ships are powered by steam turning the ships _________.
Turbines
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 Energy
500
What is the point of a Rube Goldberg machine?
To either do everyday tasks or just for the fun of it.
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%