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Dynamics - Coggle Diagram
Dynamics
Newton's first law
"An object in motion will stay in motion unless acted on by another force."
basically, a moving object will never change it's speed or direction unless something else causes it to.
Newton's second law
"The acceleration of an object varies based on the object's net force and it's mass."
the acceleration of an object is directly proportional to it's net force. However, it is inversely proportional to it's mass.
The acceleration will increase if the net force increases, therefore it will decrease if the net force also decreases and vice versa.
The acceleration of an object will increase if the mass decreases, and it will decrease if the mass increases. This is because it has an inverse relationship.
Newton's third law
"Every action has an equal opposite reaction."
When force A exerts 20 N on force B, force B pushes back at the same time with an equal force of 20 N.
ex. you pushing on a wall with a force of 20 N but not moving. This is because the wall is also pushing back in a sense.
Applying Friction
Friction: a force that opposes either the general motion of the object or the object's chosen direction.
Static Friction
The force that keeps an object in place without it getting pushed
Questions that can be associated with static friction: object at rest on an incline
Coefficient of static friction: μ
Kinetic Friction
A force that tries to keep an object in place while the object is being moved by another force.
Questions that can be associated with kinetic friction: object at rest on an incline
Coefficient of kinetic friction: μ
What is/are Dynamics?
Dynamics: the study of what forces are acting upon a moving object