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| the study of matter and energy |
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| shows continuous trends of change over time |
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| it is the factor (in an experiment) that is forced to change |
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| a rule that dexcribes a patten in nature |
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| how tightly packed substances are |
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| Standard (for measurement) |
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| exact quantity people use for comparison |
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| the rate of change in velocity |
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| newtons 3rd law of motion which says "to every action there is an equal and opposite reaction" |
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| Newtons 1st law of motion |
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| an object in motion stays in motion |
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| the frictional forces that air exerts on all moving objects opposing motion |
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| "delta" means a change in something |
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| chemical potential energy |
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EX: gasoline, food, coal, batteries
energy stored for future use |
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| the amount of energy it takes to raise the temperature 1kg of a material 1k |
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| the transfer of energy through matter or space by electomagnetic waves |
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| a spark plug produces a spark and ignites the fuel air mixture |
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a simple machine consisting of a sloping surface used to raise objects
ex:ramp Equation: L/H |
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| a simple machine consisting of a bar that is free to pivot aroung a fixed point |
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teeter-totter fulcrum in the middle
length of effort arm (divided my)
length of resistance arm |
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| the number of times a machine multiplyes the effort force |
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| application of scientific knowledge to improve human life |
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| information collected by counting |
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| the factor (in an experiment) that is changed to seee what effect it will have on the dependant variable |
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| the modern metric system based on units of 10 |
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| the tendancy of object to resist change in motion |
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| the greatest velocity reached by a falloing object |
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| push or pull exerted by one body on another |
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| when waste energy raises the temp of the environment |
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an object accelerates in the direction of the net force applied to it
F=m x a |
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| transfer of energy through motion |
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| gravitational potential energy |
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Definition
| something that has the potential to fall |
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| transfer of energy througj matter by direct contact of particles |
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| piston moves down and the fuel-air mixture come in |
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| the exhaust valve opens to remove waste and the piston moves up |
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| the fixed point around which a lever pivots |
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| a simple machine consisting of a grroved wheel with a rope or a chain running along the groove |
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fulcrum on the left
ex: wheel barrow |
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| the force applied to a machine |
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| the force exerted by the machine to overcome resistance to gravity or friction |
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| shows how a fixed quantity is broken down into smalled parts |
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| shows how a fixed quantity is broken down into smaller parts |
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| a proposed sollution to a problem |
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| a device that converts thermal energy into mechanical energy |
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| the force that resists motion between 2 surfaces that are touching each other |
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| attracting force exerted by every other object |
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| the force that causes an object to move toward the center of a curve or circular path |
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| a controled procedure for testing a hypothesis |
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| for every action there is an equal and opposite reaction |
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| the type of energy that moves from anythinf having a higher temep to anything having a lower temp |
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| a measure of the average kinetic energy of the particles in matter |
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| the transfer of energy through matter by movement of matter itself |
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| intake valve closes and piston moves up |
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| a simple machine consisting of an incline plane with 1 ot 2 sloping sides |
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| a simple machine consisting of 2 wheels of different sizes connectde so they rotate together |
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| the rate at which work is done |
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fulcrim on side with effort force in middle
ex:broom |
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Definition
| a machine in which work input=work output |
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| on a line graph where does the independant and dependant variable appear? |
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Definition
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| list the 5 steps of the scientific method in order |
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Definition
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| what is the symbol for Kevin? |
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Definition
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| list the units for a force acting on an object? |
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Definition
| force=mass x acceleration |
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| unit for velocity and average speed |
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Definition
velocity= m/s
average speed= m/s |
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| units for acceleration and mass |
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Definition
acceleration= m/s squared
mass= kg |
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| units for force and momentum |
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Definition
force= N
Momentum= kg x m/s |
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| at what rate do falling objects accelerate? |
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| describe the path of a projectile |
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Definition
| curvedd- constant and horizontal velocity, gravity affects vertical velocity |
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| what equation can be used to find average felocity? |
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| state the units for thermal energy |
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| state the equation for work |
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| what do gasoline and diesel engines have in common? |
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| both are heat engines, 4 stroke engines, and internal combustion engines |
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| what 3 things can a machine change about force? |
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Definition
1. direction- crowbar you push down it pushed up
2. amount- single moveable pulley
3. speed/distance-3rd class lever , broom |
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| hockey stick belongs to which class of simple machines? |
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Definition
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| what is the MA of a single fix pulley? |
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Definition
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| what is the MA of a single moveable pulley? |
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| what is the general equation for finding mechanical advantage? |
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Definition
| mechanical advantage= resistance force/effort force |
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| what are the units for MA? |
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Definition
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| what is the equation for power? |
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Definition
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| what are the units for power |
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