Vocabulary
The amount by which force or motion is magnified in a simple machine
Mechanical advantage
The formula for mechanical advantage of a lever
The distance from fulcrum to effort / the distance from fulcrum to resistance
A block and tackle uses two pulleys. What is the mechanical advantage (MA)?
2
An experiment to find a better gasoline mixture for automobiles would be what type of experiment?
Applied science (useful)
Which 2 simple machines look identical?
Inclined plane
Simple wedge
What is force?
A push or pull exerted on an object in an effort to change that object's velocity
The formula for mechanical advantage of a wheel and axle
Diameter of wheel / diameter of axle
What is the MA of a wedge that has a length of slope 20 feet and a height of 3 feet?
6.66
A spray that when sprayed around a campsite keeps bears away is an example of ?
Technology
A 3rd class lever magnifies what?
Speed
What is circumference (including the formula)?
The distance around a circle, 3.1416 times the circle's diameter
The formula for mechanical advantage of a pulley
The number of pulleys used
What is the MA of a wheel and axle if the diameter of the wheel is 6 inches and the diameter of the axle is 3 inches?
2
A lever in which the effort is in the middle.
What is a 3rd-class lever?
What are the 6 types of simple machines?
lever, wheel and axle, pulley, inclined plane, wedge, screw
What's the definition of Rube Goldberg?
Doing by complex means what could be done simply.
The formula for mechanical advantage of a screw
Circumference / pitch
What is the MA of a screw if the circumference is 40 inches and the pitch is 5 inches?
8
Technology is often a result of what 3 things?
Science, applied science, or accident
Does a single or double wedge have more MA and why?
Single because a double wedge has twice the height (the more height, the smaller the MA)
Effort is exerted along the ________ of an inclined plane but against the _______________ of a wedge.
slope
short side
The formula for mechanical advantage of a wedge
The length of slope / total height
What is the MA of a screw that has a diameter of 30cm and a pitch of 2cm?
47.1
A pencil sharpener is made up of what 2 simple machines?
Wheel and axle
ScrewExplain the difference in MA for a wheel and axle
Turning the wheel magnifies force
Turning the axle magnifies speed