Dynamics

  1. Newton's first law
  1. Newton's second law
  1. Newton's third law
  1. Applying Friction
  1. What is/are Dynamics?

Dynamics: the study of what forces are acting upon a moving object

"An object in motion will stay in motion unless acted on by another force."

"The acceleration of an object varies based on the object's net force and it's mass."

"Every action has an equal opposite reaction."

basically, a moving object will never change it's speed or direction unless something else causes it to.

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.

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.

Friction: a force that opposes either the general motion of the object or the object's chosen direction.

Static Friction

Kinetic Friction

The force that keeps an object in place without it getting pushed

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 static friction: object at rest on an incline

Questions that can be associated with kinetic friction: object at rest on an incline

Coefficient of static friction: μ

Coefficient of kinetic friction: μ