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# Midterm

TermDefinition
Work When a force causes an object to move a certain distance.
Power Accomplish a lot of work strength, authority have control have a lot of energy
Energy The ability to do the work
Potential Energy Stored energy
Kinetic Energy The energy of an object in motion KE= 1/2 *m*v2
Gravitational Energy stored due to the position of the object above the surface of the earth. GPE=m*g*h
Electrical Energy stored due to the position of charges relative to each other
Chemical Energy stored in the chemical bonds of molecules for reactions. (Food, gasoline)
Nuclear Energy stored in the nucleus of an atom that can cause enormous explosions
Thermal, Sound, Radiant The energy released as a by-product f kinetic energy.
Applied A physical push or push between two objects or people
Friction The force that opposes motion and causes objects to slow down. (Air, Sliding, Viscous, Rolling)
Gravity The attractive force between ANY two objects that have mass; causes objects to fall toward the earth
Air Pressure The forces applied by moving gas
Electromagnetic force Forces between changed objects
Force Strength or energy as an attribute of physical activity or movement. F=ma
Centripetal The force that makes objects spin or change direction
Buoyancy Fluid force on objects to make them float
Lift Upward force of air that causes objects to arise when moving at a high rate of speed
3 ways we can accelerate Slowing down, Speeding up, Changing direction
Normal Force It's the force provided by the surface an object sits on
Inertia Resistance to changing its motion
Newton's 1st law An object keeps doing what it's doing unless acted on by an unbalanced force
Newton's 2nd law Acceleration is produced when a force acts on a mass. The greater the mass the greater the amount of force needed
Newton's 3rd law For every action, there's an equal and opposite reaction.
Gravity An attractive force between objects that have mass
Acceleration due to gravity The rate at which objects accelerate towards the earth when the force of gravity pulls on them
Mass How much matter is in an object
Weight The force produced by an object's mass due to gravity Fw= mg
Friction A force that always acts in the opposite direction of motion
Static When two objects are touching each other, but the force, friction is preventing movement
Air The force that slows an object down when it is falling and cutting through the atmosphere
Sliding When two objects are moving past each other, but with some resistance
Viscous The friction created by a liquid running over a surface
Rolling Created by one object over another
Momentum Mass in motion and how hard it is making a moving objects stop P-mv
Directly proportional When two variables increase or decrease together with a constant ratio
Inversely proportional When one variable increase, the other decrease.
Acceleration How much a car velocity time
Instantaneous Describes that acceleration at a specific moment
Average Describes the acceleration for the total trip
Scientific method Ask a question, Formulate a hypothesis, Design and conduct an experiment, collect and analyze data, Test conclusion
Mnemonic for metrics Henery, Died, Unexpendly, Drinking, Chocolate, Milk
Qualitative Observations use an adjective to describe something
Quantitative Observations use numbers to measure something in a quanative way
Precision How close repeated measurement come to each other
Accuracy How close a measurement is to the true or real value
Created by: 100001496861938