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Chapter 8 Vocab

Chapter 8 Vocab.

pulley a smiple machine that consists of a wheel over which a rope, chain, or wire passes
Lever a simple machine that consists of a bar that pivots at a fixed point called a fulcrum
wedge a simple machine that is made up of two inclined planes and that moves; often used for cutting
screw a simple machine that consists of a inclined plane wrapped around a cylinder
wheel && axle a simple machine consiting of two circular objects of different sizes; the wheel is the larger of the two circular objects
inclined plane a simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp
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; the product of the input force and the sitance through which the force is exterted.
work output the work done by a machin; the product of the output force and the distance through which the force is exerted
mechanical advantage a number that tells how many time a machine mulitples force
mechanical efficiency a quantity usually expresed as a percentage, that measures the ratio of work output to work input; it can be calculated by dividing work output by work input
compound machine a machine made of more than one simple machine
power the rate at whihch owkr is done or envergy is transformed
watt the unit used to express pwer; equivalent to joules per second (symbol W)
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; equivalent to the amount of work done by a force of 1 n acting through a distance of 1 m in the dircestion of the force (symbol J)
Created by: SloaneSarabia16