Key To Physics Vocabulary Flashcards
Force
Push or pull that gives you energy
Friction
Force that one surface exerts on another, when the to rub against each other. Eventually causes motion to stop
Sir Isaac Newton
During 1665-1666 He developed the three laws that describe all states of motion
Momentum
Product of an objects mass times velocity
Inertia
Moving objects tend tendency to continue in straight lines Or of a stationary object to remain in place
2nd law of motion
Law that shows how mass force and Acceleration are related. (F=m X a)
Rolling friction
Friction produced by wheels or rolling over surfaces
Fluid friction
Friction exerted by water, oil and air as an object moves through it
Gravity
Force that pulls objects toward each other
Sliding friction
When solid surfaces slide over each other
Unbalanced force
A force that changes the direction of an objects movement
Balanced force
A force that does not change the direction of an object movement
1st law of motion
An object at rest will remain at rest and an object in motion will continue moving at a constant speed unless acted upon by an unbalanced force
Weight
Measure of the force of gravity on an object (2nd law of motion)
Law of universal gravitation
Gravity acts between objects everywhere in the universe
Law of conservation of energy
The rule stating matter or energy is not created or destroyed merely changed from one form to another
3rd law of motion
If one object exerts a force on another object then the second object exerts a force of equal strength in the opposite directions
Air resistance
An upward force that increases with velocity and surface area so that a falling object falls more slowly
Motion
Change in position over time
Form of reference
Background Or point that is assumed to be stationary and is used for comparison when motion is described. Example a car drives down the street. The person inside the car has a different frame of reference that the person watching the Car pass
Speed
Rate at which an object moves
To calculate speed=distance/time
Velocity
Speed in a given direction. Traveling 60 KM/ hour north
Acceleration
Rate of change in velocity speed may change or direction may change if something accelerates