| Levers/ Pulleys | Pulleys | Levers | Mixing it up!!!! | Be Brave!!!! Pick this category! |
| 10 | 10 | 10 | 10 | 10 |
| 20 | 20 | 20 | 20 | 20 |
| 30 | 30 | 30 | 30 | 30 |
| 40 | 40 | 40 | 40 | 40 |
| 50 | 50 | 50 | 50 | 50 |
| Final Question | ||||
Scissors and a teeter- totter are class 1 levers, true or false?
Scissors and a teeter- totter are class 1 levers, true or false?
True
What is mechanical advantage?
What is mechanical advantage?
How much easier and faster a machine makes your work.
Do you have a mechanical advantage when using a fixed pulley or movable pulley?
Do you have a mechanical advantage when using a fixed pulley or movable pulley?
Movable pulley
Name two examples of a fixed pulley
Name two examples of a fixed pulley
- Window blinds - Window blinds - Clothesline
What are two ways pulleys can make life easier
What are two ways pulleys can make life easier
- make it easier to pull a rope - change direction of a force - get more mechanical advantage
What are the two types of pulley?
What are the two types of pulley?
Fixed and movable pulley
A single fixed pulley system has.. how many wheels and what is it attached to?
A single fixed pulley system has.. how many wheels and what is it attached to?
One wheel, which is attached to something high
Pulleys can be fixed or movable. Which kind of pulley reduces the effort needed to life the load?
Pulleys can be fixed or movable. Which kind of pulley reduces the effort needed to life the load?
Movable pulley
The more wheels you use, the less/more force you have to use to lift and object?
The more wheels you use, the less/more force you have to use to lift and object?
less
Explain what a pulley is- Include the parts of a pulley
Explain what a pulley is- Include the parts of a pulley
is a wheel with two raised edges so that a rope or a string will run along the wheel without coming off.
Define lever effort
Define lever effort
The amount of force used to move a load
True or False: In a class 1 lever system the fulcrum is in the middle?
True or False: In a class 1 lever system the fulcrum is in the middle?
True
The pivot or turning point of a lever is called?
The pivot or turning point of a lever is called?
Fulcrum
Define load
Define load
the weight of an object that is being moved
What are the three parts of a lever?
What are the three parts of a lever?
Fulcrum,load,effort
What is one example of a movable pulley?
What is one example of a movable pulley?
Crane, weight training machines
In a class 1 lever system the fulcrum is in the middle, true or false?
In a class 1 lever system the fulcrum is in the middle, true or false?
true
In a class 2 lever system is the lever in the middle? Yes or No
In a class 2 lever system is the lever in the middle? Yes or No
Yes
In a class 3 lever system the effort is in the middle, true or false?
In a class 3 lever system the effort is in the middle, true or false?
true
What kind fo pulley can be used to bring a bucket of water up and down from a tree house?
What kind fo pulley can be used to bring a bucket of water up and down from a tree house?
fixed pulley
If you wanted to carry bricks what simple machine would you use?
If you wanted to carry bricks what simple machine would you use?
A pulley
A golf club and tweezers are examples of a class 3 lever ,true or flase?
A golf club and tweezers are examples of a class 3 lever ,true or flase?
true
Why is a wheelbarrow and a nutcracker examples of class two levers?
Why is a wheelbarrow and a nutcracker examples of class two levers?
The load is in the center
What happens to the amount of effort required to life a load as the load gets closer to the fulcrum?
What happens to the amount of effort required to life a load as the load gets closer to the fulcrum?
The effort decreases.
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