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Forces and Motion
Term | Definition |
---|---|
acceleration | |
average speed | |
buoyant force | |
efficiency | |
force | |
inclined plane | |
mass | |
motion | |
pascal | |
reference point | |
speed | |
unbalanced forces | |
weight | |
air resistance | |
balanced forces | |
centripetal force | |
fluid | |
friction | |
inertia | |
mechanical forces | |
net froce | |
Pascal's principal | the rule that when a force is applied to a confines fluid, the increase in pressure is transmitted equally to all parts of the fluid |
rolling friction | friction that occurs when an object rolls over a surface |
static friction | friction that acts on objects that are not moving |
velocity | speed in a given direction |
work | force exerted on an object that causes it to move |
fulcrum | the fixed point at which a lever pivots |
fluid friction | friction that occurs as an object moves through fluid |
lever | a simple machine that consists of a rigid bar that pivots about a fixed point |
newton | a unit of measure that equals to the force required to accelerate 1 kilogram of mass at 1 meter per second per second |
power | the rate at which work is done |
wedge | a simple machine that is an inclined plane that moves |
Archimede's principal | the rule that the buoyant force on an object is equal to the weight of the fluid the object displaces |
Bernoulli's principal | the rule that a stream of fast moving fluid exerts less pressure than the surrounding fluid |
compound machine | a device that combines two or more simple machines |
gravity | the force that pulls objects towards each other |
machine | a device that changes the amount of force exerted, the distance over which a force is exerted, or the direction in which force is exerted |
momentum | the product of an object's mass and velocity |
pulley | a simple machine that consists of a grooved wheel with a rope or cable wrapped around it |
sliding friction | friction that occurs when one solid surface slides over another |
terminal velocity | the greatest velocity and object can achieve |