Term
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Definition
| a push or pull that acts on an object |
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Definition
| Contract, Friction and Action at a Distance |
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Definition
| must touch an object to push or pull, such as a racket hitting a ball |
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Definition
| a force that is opposite to the motion of an object, such as a puck sliding on the floor |
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Term
| Action at a Distance force |
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Definition
| can push or pull without touching an object such as gravity, magnetism or static electricity |
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Term
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Definition
| the number of particles in an object, the amount of matter |
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Definition
| the amount of force an object has due to gravity pulling it downward |
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Term
| Difference between mass and weight |
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Definition
| Mass does not change with gravity. Weight does change with gravity. You weigh less on the moon but have the same mass. |
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Definition
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Definition
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Term
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Definition
| m/s2, the measure of gravity |
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Term
| Equation to calculate force |
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Definition
| Force = Mass X Acceleration or F = M x A |
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Term
| Two ways to calculate force |
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Definition
| use F=MxA equation or using a Newton Scale |
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Term
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Definition
| when force causes an object to move a distance |
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Term
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Definition
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Term
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Definition
| unit to measure both work and energy |
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Term
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Definition
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Term
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Definition
| the energy of an object in motion |
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Term
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Definition
| Energy that is stored to use later |
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Term
| 5 types of Kinetic energy |
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Definition
| light, sound, heat, electrical and mechanical |
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Term
| 3 types of Potential energy |
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Definition
| chemical, elastic, gravitational |
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Term
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Definition
| kinetic - energy that allows us to see, ie a light bulb |
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Term
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Definition
| kinetic - energy caused by moving waves, ie blowing a whistle |
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Term
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Definition
| kinetic - energy caused by moving particles or friction, ie rubbing your hands together |
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Term
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Definition
| kinetic - energy caused by flowing electricity or electrons, ie lightning |
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Term
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Definition
| kinetic - energy that does work, ie turning gears |
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Term
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Definition
| potential - eneregy caused by a chemical reaction, ie eating food |
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Term
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Definition
| potential - energy caused by a stretched object, ie a spring |
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Term
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Definition
| potential - energy caused by gravity, ie a dropping glass |
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Term
| Law of Conservation of Energy |
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Definition
| energy cannot be created or destroyed, it can only be changed from one form to another, so the amount of energy into a system equals the amount of energy that comes out |
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Term
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Definition
work = Force X Distance or W = F x D
note work will be in J or Nm units |
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Term
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Definition
| device made up of fixed and moving parts that do a specific job, or a device that reduces the force required to do a job |
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Term
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Definition
| increase the force applied, increase the distance over which the force is applied or change the direction of a force |
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Term
| Machine that increases force applied |
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Definition
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Term
| Machine that increases the distance over which force is applied |
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Definition
| a ramp between two heights, like on the back of a moving truck |
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Term
| Machine that changes the direction of the force applied |
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Definition
| a pulley on a flag pole or a teeter totter |
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Term
| Two types of force with a machine |
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Definition
| input force and output force |
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Term
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Definition
| the force applied to the machine |
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Term
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Definition
| the force the machine applies to the object |
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Term
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Definition
| the amount by which a machine multiplies an input force, how much greater the output is because of the machine.. it is the amount of work a machine adds |
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Term
| Units to measure mechanical advantage |
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Definition
| there are no units, it is a multiple of .. ie the machine increased the force by 5 times |
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Term
| Mechanical Advantage formula |
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Definition
| MA = Output Force / Input force |
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Term
| Ideal Mechanical Advantage |
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Definition
when a distance value is used to calculate mechanical advantage
IMA = input distance / output distance |
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Term
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Definition
| requires more output force, but the input force will move a greater distance. example a hammer removing a nail |
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Term
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Definition
| Requires more input force, input will move shorter distance and output will have greater speed. ie a hockey stick being used to shoot a hockey puck, the hand moves a little, the stick or lever moves more and puck moves fast |
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