Term
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Definition
| something electrons can pss through easily |
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Term
| In which direction do electrons flow in a battery? |
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Definition
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Term
| As the electrons pass by the light bulb, what happens? |
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Definition
| they change the gas to plasma and it glows |
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Term
| What happens when you recharge a battery? |
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Definition
| you reverse the flow of electrons |
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Term
| What is needed to make a battery? |
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Definition
| zinc, copper, copper sulfate, circuit |
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Term
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Definition
the force at which gravity pulls an object down
mass * gravity
~acceleration due to gravity = 9.8 m/s^2~
mass * 9.8
--units: N or lbs-- |
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Term
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Definition
how much matter is in an object
--units: kg-- |
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Term
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Definition
a push or pull on an object
--units: N-- |
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Term
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Definition
the force that pulls an object to the core of its planet
the universal pull/attraction of any object to any other object |
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Term
| What 2 things does gravity depend on? |
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Definition
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Term
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Definition
| the force that opposes motioin between 2 surfaces that are in contact with each other |
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Term
| What are the factors that affect friction? |
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Definition
| speed of the object(s), surface type, force pressing the surfaces together |
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Term
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Definition
a body at rest will remain at rest or a body in motion will remain in motion unless acted upon by an outside force
~inertia~ |
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Term
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Definition
an object will accelerate in the direction of the net force acting on it
the accelration is inversely proportional to the object's mass (the bigger an object is, the less it will accelerate; dori will accelerate more than john)
F(net)=mass * acceleration |
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Term
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Definition
| for every action there is an equal and opposite reaction |
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Term
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Definition
forces equal in size and opposite in direction
~ex. 2N pulling block, 2N resisting |
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Term
| Mass is directly proportional to ______ |
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Definition
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Term
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Definition
| the tendency of an object to resist a change in motion |
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Term
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Definition
the force air exerts on a moving object
(sort of like friction in the air) |
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Term
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Definition
| highest velocity reached by a falling object |
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Term
| Centripetal acceleration-- |
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Definition
| the acceleration to the center of a curved path |
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Term
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Definition
the tendency of an object to move to the center
~ex. roller coasters, swinging a bucket over your head |
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Term
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Definition
the speed at which an object is traveling in a single direction
~change in distance over change in time~ |
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Term
| What is the difference between batteries in series and batteries in parallel positions? |
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Definition
series --> multiplies voltage
*more power*
parallel makes it last longer (doesn't multiply)
*lasts longer* |
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Term
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Definition
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Term
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Definition
a device that makes work easier
*simple machine--a device that does work with only 1 movement* |
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Term
| effort force/input force-- |
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Definition
| force applied to the machine |
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Term
| resistance force/output force-- |
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Definition
| force applied by the machine to overcome friction/gravity |
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Term
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Definition
one in which work in = work out
no friction/resistance |
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Term
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Definition
| number of times a machien multiplies input force to get output force |
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Term
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Definition
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Term
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Definition
ideal mechanical advantage:
input distance/output distance |
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Term
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Definition
actual mechanical advantage
output force/input force |
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Term
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Definition
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Term
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Definition
output work/input work
AMA/IMA |
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Term
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Definition
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Term
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Definition
| # of ropes holding up the movable pulley(s) |
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Term
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Definition
| input length/output length |
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Term
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Definition
| radius of the wheel/radius of the axle |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
| 3 ways machines make work easier |
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Definition
~change direction of force
~tradeoff input force for input distance
~tradeoff input distance for input force |
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Term
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Definition
| the location of a point in space |
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Term
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Definition
| where a point in space is located in comparison to another point in space |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| rate of change in position (rate of motion) |
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Term
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Definition
*constant speed: does not vary over time
*instantaneous speed: rate of motion at any given instant (change in distance/change in time)
*avg speed: total distance/total time |
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Term
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Definition
rate of change in velocity
(final velocity-initial velocity)/time |
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Term
| What is the slope of a dist vs. time graph? |
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Definition
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Term
| What is the slope of a velocity vs. time graph? |
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Definition
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Term
| If there is a flat line on a v vs. t graph, what does that mean? |
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Definition
| the object is moving at a constant speed; acceleration = 0 |
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Term
| If there is a flat line on a d v. t graph, what does that mean? |
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Definition
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Term
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Definition
| potential energy + kinetic energy |
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Term
potential energy--
(gravitational) |
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Definition
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Term
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Definition
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Term
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Definition
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Term
| law of conservation of momentum-- |
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Definition
| momentum is neither gained nor lost, only transferred, unless acted upon by outside forces |
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Term
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Definition
| a liquid or paste that provides the necessary ions to charge the electrodes in a battery |
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