Kinetic Energy
What is the formula for Kinetic Energy?
KE = ½mv²
A force that opposes motion
Friction
A contact force that a person or object directly applies to another object
Applied Force
Stored energy that an object has due to its position or condition
Potential Energy
Which has a larger affect on Kinetic Energy mass or speed?
Speed
The force that opposes the motion of objects moving through air. It pushes back against moving objects and can slow them down.
Air resistance
A push or pull that occurs when objects are touching each other
Contact forces
The total amount of energy in a system remains constant during interactions. Energy may change forms but the total never increases or decreases. This is an example of
Conservation of Energy
Doubling the mass of an object does what to its KE?
Doubles it
blows in the same direction you're traveling, pushing you forward and helping you move faster
Tailwind
The movement of energy from one object or system to another
Energy Transfer
______ occurs when forces cause objects to move or change.
Energy Transfer
Doubling the speed of an object does what to its KE?
Quadruples it
blows against your direction of travel, creating resistance that slows you down
Headwinds
The principle that energy cannot be created or destroyed, only transferred or transformed
Energy Conservation
A more massive object requires more ____ to move?
Force
Which has more KE: a 3000 kg truck going 10 mph or a 1000 kg car going 50 mph?
1000 kg car going 50 mph
What surface creates more friction: carpet or tile?
Carpet
The contact force that surfaces exert to support objects, acting perpendicular to the surface
Normal force
The more _______ an object has, the more damage it can cause in a collision.
KE