In this unit we learned about different types of forces and how they act on objects. We used and learned three of Issac Newtons laws to get a better understanding of forces. We also learned about force diagrams and how to solve problems with different types of forces and motion.
Newton's First Law
Definition - an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
Inertia is the act of the object staying the same unless an external force is acted on it. Is not external forces are action on it then it will not have a change in velocity or net force.
Inertia is the act of the object staying the same unless an external force is acted on it. Is not external forces are action on it then it will not have a change in velocity or net force.
Newton's Second Law
Definition - The acceleration of an object is dependent on two things, the net force and the mass of the object.
If the there is no acceleration and the net force is zero the forces will be balanced. But if the net force is not zero and the forces are unbalanced there will be acceleration and it depends on the mass of the object
Equation - acceleration = Net Force / Mass
If the there is no acceleration and the net force is zero the forces will be balanced. But if the net force is not zero and the forces are unbalanced there will be acceleration and it depends on the mass of the object
Equation - acceleration = Net Force / Mass
Newton's Third Law
Definition - If two forces are acting upon an object they will be equal and opposite to each other.
An example of this is the earth and the moon. They have a gravitational pull on each other but one does not have a greater force on the other, the force from the earth on the moon is equal and opposite to the force of the moon on the earth.
An example of this is the earth and the moon. They have a gravitational pull on each other but one does not have a greater force on the other, the force from the earth on the moon is equal and opposite to the force of the moon on the earth.
System Schemas and Force Diagrams
Both system schemas and force diagrams make it a lot easier when solving problems involving forces. You should always start a problem by drawing a system schema and a force diagram to avoid mistakes and to make life easier. Below is first a system schema then a example of a force diagram.
System Schema - https://lh4.googleusercontent.com/-nvL9RX7tg6L-hQeEQC03Ao3QyIZ8IfTd-dKZwdeJ99mRSeIC54MpOFX7wc6XTB2O5-VI3qsqnim2-vyaud4N-L3ojksAIrhbs8b-UyTgQFwo_26i4D-ZcXHy1lxEKn6ssdZpj5J4Q
Force diagram - https://www.physicsclassroom.com/Class/newtlaws/u2l2c1.gif
Force diagram - https://www.physicsclassroom.com/Class/newtlaws/u2l2c1.gif
Force Calculations and Solving Force Problems
https://www.wikihow.com/images/b/b3/Calculate-Force-Step-6.jpg
https://study.com/cimages/videopreview/videopreview-full/screen_shot_2015-05-01_at_4.16.07_pm_138182.jpg
Force Problems with Motion
https://i.ytimg.com/vi/tfAJDST3cjo/maxresdefault.jpg
http://www.kesmai.com/images/1-D%20Force.PNG
Video on Newtons Third Law
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