Motion 2

Created by Spieringsk 

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11 terms · Physical Science Spierings, RHS Spring 2012

Weight

the quantity of heaviness, taking into account gravity

Mass

measure of how much matter is in an object

Force

strength put on an object; has direction (is a vector quantity); measured as newtons

Friction

the resistance of one surface has on another object or surface

Gravity

force on an object to tend to fall towards the center of the earth

Newton

a unit to measure force; equals: 1kg * m/s2

Inertia

a characteristic of matter which states the object will continue in its existing state of rest or motion unless an outside force acts on it (Latin word means lazy)

Negative Acceleration

when acceleration is in a direction opposite to the velocity or in the direction of the negative axis on the velocity vs. time graph

Positive Acceleration

when the velocity vs. time graph has a positive slope; velocity is increasing

Instantaneous Speed

the speed at a given moment (ex: a car's speedometer)

Average Speed

calculated using the total distance traveled and the total time traveled
Web to show the difference between instantaneous &average speed: http://bit.ly/zOeFBY

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