Mass Resists Acceleration
Newtons Second Law of Motion
The resulting acceleration of an object is directly proportional to the net force acting on the
object, is in the direction of the net force and is inversely proportional to the mass of the object
Condensation in the Atmosphere
There is always some water vapor in the air. A measure of the amount of this water vapor is
called humidity (mass of water per volume of air).
Fog and Clouds
Warm air rises. As it rises, it expands. Cooler air falls
Fasten one end of a rope to a wall and hold the free end in your hand. If you suddenly twitch the
free end up and then down, a pulse will travel along the rope and back. This is illustrated in the
that are Longitud
A change in pressure at any point within an enclosed fluid at rest is then transmitted
undiminished to all points in the fluid
Pascals principle describes hydraulics
Gases and Plasmas
The atmosphere is a bunch of different
Any force that is directed toward a fixed center is commonly called a centripetal force. The word
centripetal means center seeking or toward the center.
Centripetal force is required for an object to move in a circle. If there is no cent
Conservation of Energy
The Law of Conservation of Energy: Energy cannot be created or destroyed; it may be
transformed from one form into another, but the total amount of energy never changes.
Applies to machines: Work input = work output
Support force = normal force
Support force is a reaction force. It cant be bigger than your weight, it only reacts to your
If the object is resting on the surface, then the normal force has a magnitude that is equal to the
Changes in motion are produced by a force or combination of forces (later well refer to changes
in motion as acceleration) A force, in the simplest sense, is a push or a pull.
Its source may be gravitational, electrical, magnetic, or simply musc
When an object bounces off of something, the force that that object exerts is at its maximum
possible value for that collision
If the time is small, the force is big. If the time is large, the force is small.
Conservation of Momentum
Like charges repel. Opposite charges attract
The terms positive and negative refer to electric charge, the fundamental quantity that underlies all
electrical phenomena. The positively charged particles in ordinary matter are the