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| International System of Units |
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| The system of measurement scientist use all over the world to communicate information clearly. |
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| The Basic SI unit of length |
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| The prefix that means "one thousand." It is a big measure. |
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| Total distance divided by total time |
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| Distance an object travels per unit of time |
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| When an object keeps a steady pace and speed does not change |
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| Tells both the speed and direction an object is traveling |
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| An object is in motion if it changes position relative to what? |
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| When an object's distance from another object is changing it is... |
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| The rate in which velocity changes. It can speed up, slow down or change direction. |
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| happens when an object accelerates by speeding up |
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| when an object accelerates by slowing down |
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| The amount of something that occurs or changes in one unit if time is referred to as... |
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| how far it is from a starting point to a stopping point |
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| final velocity - initial velocity/time |
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| the amount of matter an object has |
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| the tendency of an object to resist a change in motion |
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| Newton's first law of motion |
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| states an object at rest will remain at rest, and an object in motion will remain in motion until acted upon by an outside force |
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| Newton's second law of motion |
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Definition
| Force = Mass times acceleration |
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| Newton's third law of motion |
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| States that for every action force their is an equal and opposite reaction force. |
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| An equal force acting on an object in an opposite direction. |
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| The overall force of an object after all the forces are added together |
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| Two unequal forces acting in opposite directions to cause motion |
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| The force that one surface exerts on another surface hen the two surfaces rub against each other |
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| When the only force acting on a falling object is gravity |
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| when solid surfaces slide over each other, the kind of friction that occurs |
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| the fluid friction experienced on objects falling through the air |
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| the kind of friction that occurs when an object rolls over a surface |
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| the kind of motion that happens when an object is thrown |
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| The friction that occurs when an object moves through a liquid or a gas |
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| The force of gravity on a person or object at the surface of a planet. It is the stuff that makes us touch the ground and walk or stand. The moon has none so folks float up there :) |
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| The force that pulls objects towards each other. Like us and the ground. |
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| The Law of Universal Gravitation |
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| states that the force of gravity acts between all objects in the universe |
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| The product of mass and velocity. Momentum = Mass x Velocity |
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| The Law of Conversation of Momentum |
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| States that the total momentum of any group of objects remains the same unless outside forces act on the objects |
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| The upward force exerted by a fluid on a submerged object |
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| Mass per unit of volume. Density = Mass/Volume (per means divided by) |
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| The force exerted by the first object on a second object |
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| The prefix that means "one thousandth." It is a tiny measure. |
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| True or False: For WORK to be done an object must move some height as a result of force |
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| False. It must move some DISTANCE as a result of force |
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| The unit of measure of Force |
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| The unit of measure for WORK |
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| Simple Machines decrease the amount of work that is done |
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| A lever pivots around a fixed point called a... |
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| the number of times a machine increases the effort force to make it easier to do work |
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| The three parts of a lever are: |
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| The three parts of a lever are: |
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| True or False: Machines make work easier by changing a force's speed, size and direction |
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| True or False: A fixed pulley changes the direction of the force needed to lift a load |
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| the amount of force needed to life a load |
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| A block and tackle changes |
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| both the amount and the direction of a force needed to lift a load |
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| True or False: A screw is an incline plane wrapped around a cylinder |
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| a device with toothed wheels that fits into another wheel |
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| the weight of an object that is moved by a machine, or the resistance to movement that a machine must overcome. |
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| a force applied to a machine to lift a load or overcome the resistance |
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| a simple machine made up of two inclined planes placed back to back, like a chisel or a knife. |
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| a machine that utilizes two or more simple machines |
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| True or false: Class 3 levers help increase effort force. |
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| False: Class 3 levers help increase speed and distance |
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| True or False: MA of a pulley system is equal to the number of ropes that actually support the load. |
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| Class one and two levers increase this |
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