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Vande's Sci. Stack
Forces & Motion
| Question | Answer |
|---|---|
| Archimedes' Principle | The rule that the buoyant force on an object is equal to the weight of the fluid the object displace. |
| Balanced forces | Equal forces acting on an object in opposite directions. |
| Bernoulli's principle | The rule that a stream of fast-moving fluid exerts less pressure that the surrounding fluid. |
| buoyant force | The upward force exerted by fluid on a submerged object. |
| centripetal force | A force that causes an object to move in a circle. |
| compound machine | A device that combines two or more simple machines. |
| efficiency | The percentage of the input work that is converted to output work. |
| fluid friction | Friction that occurs as an object moves through a fluid. |
| fulcrum | The fixed point around which a lever pivots. |
| inertia | The tendency of an object to resist any change in its motion. |
| mass | The amount of matter in an object. |
| mechanical advantage | The number of times a machine increases a force exerted on it. |
| momentum | The product of an object's mass and velocity. |
| net force | The overall force on an object when all the individual forces acting on it are added together. |
| newton | A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second. |
| pascal | A unit of pressure equal to 1 newton per square meter. |
| Pascal's principle | The rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. |
| reference point | A place or object used for comparison to determine if an object is in motion. |
| rolling friction | Friction that occurs when an object rolls over a surface. |
| sliding friction | Friction that occurs when one solid surface slides over another. |
| static friction | Friction that acts on objects that are not moving. |
| terminal velocity | The greatest velocity a falling object can achieve. |
| unbalance forces | Forces that produce a nonzero net force, which changes an objects motion. |
| velocity | Speed in a given direction. |
| wedge | A simple machine that is an inclined plane that moves. |
| weight | The force of gravity on an object at teh surface of a planet |
| work | Force exerted on an object that causes it to move. |
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vande9988
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