An object at rest stays at rest and an object in motion stays in motion with the same speed and direction unless acted upon by an outside force.
A force is equivalent to an object's mass multiplied by its acceleration.
For every action, there is an equal and opposite reaction.
Describes the motion of objects. There are three branches of classical mechanics:
the study of equilibrium and its relation to forces
the study of motion and its relation to forces
the study of motion without considering the forces that cause the motion
The relationship between motion and its causes, specifically forces and torques.
An interaction between objects, such as a push or pull.
Figure: Free body diagram showing the forces involved when of a skateboarder grinds down a rail.
A force that causes an object to rotate about an axis.
Figure: Torque is a twisting force that tends to cause rotation.
a scalar quantity that describes the total amount the object has moved.
a vector quantity that refers to the object's change in position.
The rate of change of distance over time.
Velocity quantifies the rate of change of displacement over time.
A vector quantity that defines the rate of change of velocity with respect to time.
Translational (Linear) Motion
Rotational (Angular) Motion
x = displacement
ʋ = velocity
a = acceleration
θ = angular displacement
ω = angular velocity
α = angular acceleration
t = time