Levers and Moments
Warmup:
1) Distinguish Static Friction and Kinetic Friction.
2) What type of force does the following:
a. Holds an elevator up on a cable
b. The attraction between objects with mass
c. The force that opposes motion
3) Archimedes said, " Give me a lever long enough and a place to stand and I will move the world." What do you think he means?
1) Distinguish Static Friction and Kinetic Friction.
2) What type of force does the following:
a. Holds an elevator up on a cable
b. The attraction between objects with mass
c. The force that opposes motion
3) Archimedes said, " Give me a lever long enough and a place to stand and I will move the world." What do you think he means?
1) Torque/Moments
Torque is another factor caused by force. It is called a turing force or moments. It is responsible for makings something on a pivot turn around a circle. Torques also have a magnitude (amount) and direction, just like other forces. They also can be added in the same direction or subtracted in the opposite directions. Therefore they can be balanced or unbalanced depending on the forces.
image: http://mdmetric.com/tech/torqcht2.htm |
2) Parts of a Lever
Levers are simple machines that use torque and distance to assist in lifting or moving an object. All levers consist of 3 part:
1) Fulcrum/Pivot - The point on which the lever rests.
2) Load - The force of the object that is to be moved.
3) Effort - The force of the person or object being moved.
1) Fulcrum/Pivot - The point on which the lever rests.
2) Load - The force of the object that is to be moved.
3) Effort - The force of the person or object being moved.
3) Classes of Levers
There are three classes of levers depending on the location of the three parts.
1) Class One: The fulcrum is between the load and effort
2) Class Two: The Fulcrum is on the end, the load is in the middle, and the effort is on the other side.
3) Class Three: The opposite of class 2. The fulcrum is on the end, the effort is in the middle, the load is on the other side.
http://www.learnhive.net/learn/icse-grade-6/physics/simple-machines
1) Class One: The fulcrum is between the load and effort
2) Class Two: The Fulcrum is on the end, the load is in the middle, and the effort is on the other side.
3) Class Three: The opposite of class 2. The fulcrum is on the end, the effort is in the middle, the load is on the other side.
http://www.learnhive.net/learn/icse-grade-6/physics/simple-machines
4) Basic Exercises
What class of lever is shown below:
5) Investigating Moments
Use the application to find a mathematical relationship of how to balance each side of the Class 1 Lever. (Do not look it up)
If you find it please write it down then play the game to check if you are correct.
If you find it please write it down then play the game to check if you are correct.