Force
A push or a pull.
Motion
A change in an object's position (it moved).
Gravity
_________ is a pull (not a push).
All objects have __________.
Objects with greater mass have greater _________.
Friction
The force that resists movement between 2 objects that are touching.
Balanced Forces
Forces that are opposite in direction but equal in strength.
Results in no movement.
Unbalanced Forces
Forces that are opposite in direction and unequal in strength.
Results in movement in the direction of the greater force.
Work
When a force is applied to an object and the object moves you have done ___________ (only if the object moves).
Potential Energy
Stored energy or energy at rest.
Increases with height and mass.
Kinetic Energy
Energy in motion.
Increases with speed and mass.
Energy Transformations
The process of energy changing easily from one form to another.
Example: Eating food (chemical) allows us to move our bodies (kinetic) until we begin to sweat (thermal).
Thermal Energy
_________ energy is also known as heat.
Radiant Energy
_________ energy is also known as solar energy (sunlight).
Chemical Energy
_________ energy is found in the food we eat and in fossil fuels that we burn.
Speed
How fast an object is traveling.
________ = distance divided by time
Velocity
The speed and direction of an object.
Example: I was traveling 70 mph east in my car.
Acceleration
A change in velocity (change in speed and/or direction).
Newton's First Law
AKA the Law of Inertia
Objects in motion stay in motion and objects at rest stay at rest unless acted upon by a force.
Newton's Second Law
AKA the Law of Force
If enough force is applied to an object the object will move.
Force = mass x acceleration or F= m x a
Newton's Third Law
AKA the Law of Action and Reaction
For every action there is an equal and opposite reaction.
Radiation
Process where energy is tranferred in waves or rays.
Convection
Process where energy is transferred by flow and circulation.
Conduction
Process where energy is transferred by the movement and colliding of molecules.