Forces and Newtons
Laws of Motion
4.1 The Concepts of Force and Mass
A force is a push or a pull.
A force is a push or pull.
An object at rest needs a force to get it moving;
a moving object needs a force to change its velocity.
4.1 The Concepts
Kinematics in One Dimension
Kinematics deals with the concepts that
are needed to describe motion.
Dynamics deals with the effect that forces
have on motion.
Together, kinematics and dynamics form
the branch of physics known as Mechanics.