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Vocab 7.1, 8

Vocab for 7.1, all of 8

QuestionAnswer
fluid any material that can flow and that takes the shape of its container
pressure the amount of force exerted on a given area
pascal the SI unit of pressure
atmospheric pressure the pressure caused by the weight of the atmosphere
work the transfer of energy to an object by using a force that causes the object to move in the direction of the force
joule the unit used to express energy
power the rate at which work done or energy is transferred
watt the unit used to express power
machine a device that helps do work by either overcoming a force or changing the direction of the applied force
work input the work done on a machine
work output the work done by a machine
mechanical advantage a number that tells how many times a machine multiplies force
mechanical efficiency a quantity, usually expressed as a percentage, that measures the ratio of work output to work input
lever a simple machine that consists of a bar that pivots at a fixed point called a fulcrum
pulley a simple machine that consists of a wheel over which a rope, chain, or wire passes
wheel and axel a simple machine consisting of two circular objects of different sizes
inclined plane a simple machine that is a straight, slanted surface which facilitates the raising of loads
wedge a simple machine that is made up of two inclined planes and moves
screw a simple machine that consists of an inclined plane wrapped around a cylinder
compound machine a machine made of more than one simple machine
Created by: whiskers426
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