levers and pulleys. lever and pulley jeopardy definitionslevers pulleys simple machines challenge???...
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Lever and Pulley Jeopardy
Definitions Levers PulleysSimple
MachinesChallenge???
10 pt 10 pt 10 pt 10 pt 10 pt
20 pt 20 pt 20 pt 20 pt 20 pt
30 pt 30 pt 30 pt 30 pt 30 pt
40 pt 40 pt 40 pt 40 pt 40 pt
50 pt 50 pt 50 pt 50 pt 50 pt
Bonus
What is a simple machine?
•Any of the six basic devices that provide mechanical advantage
•Now with your group list the 6 basic devices.
What is the tool we used to measure force/effort and what unit
does it measure in?
•The spring scale
•Newton
What is mechanical advantage?
•Reduces the force needed to lift a load and is the result of using a simple machine.
What is a pulley?
•A wheel with a grooved rim in which a rope can run to change the direction of the force that lifts the load.
What is directional advantage?
•Is a change in direction that results from passing a rope through a pulley. The direction we would pull would be down. With gravity.
•What type (s) of advantage does each system give?
A DirectionalB Mechanical
C Mechanical/DirectionalD- Directional
If you have a load that weighs 240N and you use a pulley with 4 supporting ropes, how much effort
will you need?
•60N.
A cars tires when connected to the car are an example of
what type of simple machine
•Wheel and axle.
In order to get the water to drain out of your
bathtub you need this simple machine.
•What is an inclined plane
In the kitchen you use knives to chop and cut
food. A knife is this type of simple machine
•What is a wedge?
If all the boxes weighed the same, which picture most accurately represents what the
seesaw would look like when stopped?
•A
A B C
Shaelyn is investigating the 4 different pulley systems and how they provide advantage. She uses 12 inches or rope, a 2.4N load, a spring scale, and 1-2 pulleys. Write a possible testable question she could have?.
•Answers may vary.
Write a hypothesis for this testable question.
“How the location of the fulcrum effect the amount of effort needed to lift the
load?”
•If…….then I think….will ……
On the Measuring the Distance investigation this
was our LOL.
•The benefits gained (making work easier) by using simple machines are always balanced by cost
•When the benefit out weighs the cost, the machine is a useful tool.