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Ch. 5 11-3-09

power is work done over a(n)_________ time
distance between the threads of a screw is called the ______ pitch
friction changes the useful work of a machine into ________ energy thermal
if a weight lifter is holding barbells above his head, what does he have to do to perform work lower barbells
a slanted surface used to raise an object is a(n) __________ inclined plane
a bar that is free to pivot around a fixed point is a(n)_____ lever
the rate at which work is done is called _______ power
the amount by which a machine multiplies an effort force is called the _______ mechanical advantage
an inclined plane with one or two sloping sides forms a machine called a(n) __________ wedge
an inclined plane wrapped around a cylindrical post is a(n) _______ screw
a winding mountain road is an example of a(n) ______ inclined plane
work , like energy,is measured in joules
the unit of power is the __________ watt
2 simple machines are part of a bike what are they gear\wheel and axle
a wheelbarrow is an example of what type of letter_______ second class
when 2 simple machines work together, they are called a(n)________ compound machine
Created by: fallenheart