What is the acronym we use to remember what is in the middle of all THREE different levers?
What is FLE?
100
What class lever is a steering wheel? Tire?
Class 2 = steering wheel
Class 3 = tire
100
Why is a machine never 100% efficient?
Heat and friction always takes place in machines and therefore a machine will not be 100% efficient.
100
State Pascal’s Law.
Pressure of a fluid does not change even if the container is different shapes.
100
Explain why steam is better to use then a liquid within an engine.
What is when it is heated it expands more and therefore has more volume.
200
What different advantages do a Class 1, 2 and 3 levers have?
Class 1 = directional change
Class 2 = force advantage
Class 3 = speed advantage
200
You can reduce the AMOUNT OF FORCE needed when using a wheel and axle by ___________________ the length of the wheel.
What is increasing?
200
What is potential energy?
What is stored energy?
200
A kilopascal (kPa) is equal to ______________ pascals (Pa)
What is 1000 pascals (Pa)?
200
Provide a specific example of mass production.
What is working in meat factory... any factory that produces large quantities!
300
What are the appropriate units for MA?
There are none. The number means how many times easier the work will be.
300
If you wanted a winch to have a mechanical advantage of 4 and the radius of the axle was 5 cm, how long would the handle (radius of wheel) have to be?
MA = Radius of wheel/Radius of axle
What is 20 cm?
300
Provide an example as to how friction can be efficient and useful in a machine.
Brake pads.
300
What are the two different units that can be used when calculating pressure?
What are Pa and N/m squared?
300
What is the difference between internal and external combustion?
external = combustion takes place outside of the engine
internal = combustion takes place inside the engine
400
What is one negative outcome when using an inclined plane?
It takes longer then lifting something straight up.
400
What is the first gear and last gear in a gear train called?
What is driver and follower?
400
What is the formula for calculating pressure?
What is P = F/A?
400
Why was the steamboat an part of transportation back in the day?
Carried gold seekers between regions
Transported material for fur trade and pioneers
Brought farming equipment to new societies in prairies
500
If you exert a force of 100 N on a hockey stick, and the stick exerts a force of 20 N on the puck, what is the MA of the stick?
What is 5?
500
What type of pulley has a mix of moveable and fixed pulleys?
What is a block and tackle?
500
What is a subsystem?
What is a secondary part of a larger system?
500
What are the units used for force and area?
What is newtons and meters squared?
500
What is the difference between hydraulic and pneumatic systems?
hydraulic = liquid and closed system
pneumatic = air and not closed system