simple machines stuff
Terms
undefined, object
copy deck
- definition of work
- to apple a force to the object while the object moves a distance in the direction of the force.
- throwing a basketball from one person to another
- yeah
- pushing on a box, but the box doesn't move
- no
- holding a box over your head
- no
- walking to class, holding your books
- no
- definition of simple machines
- they help people do work and they don't need a motor
- how do u calulate work
- force * distance
- what's the unit for work?
- joule
- definition of power
- how fast you do work
- what's the unit for power?
- watt
- definition of Mecanical Advantage
- tells you how many times a machine multiplies force
- how to calculate mechanical Advantage
- by dividing output by input force
- the ______ the mechanical advantage the ______ a machine makes your work.
- larger, easier
- definition of Mechanical Efficiency
- a comparison-expressed as a percentage-of a machine's work output with the work in put
- how 2 calculate Mechanical efficiency
- dividing work output by work input then multiply it by 100
- some of the ____ done by a machine is used to ________ ________ created be a machine
- work, overcome, friction
- definition of inclined plane
- a simple machine that is a straight slanted surface: a ramp
- definition of lever
- a simple machine consisting of a bar that pivots at a fixed point, called a fulcrum; there are three classes of levers, based on where the input force, output force, and fulcrum are placed in relation to the load; first class levers, second class levers, and third class levers
- definition of pulley
- a simple machine consisting of a grooved wheel that holds a rope or a cable
- definition of wedge
- a simple machine that is a double inclined plane that moves; a wedge is often used for cutting
- definition of wheel and axle
- a simple amchine consisting of two circular objects of different sizes
- definition of screw
- a simple machine that is an inclined plane wrapped in a spiral