Work
Machines
Simple Machines
Types of SM
100

the transfer of energy that occurs when a force makes an object move

work

100

a device that makes doing work easier

machine

100

the baseball bat is an example of

third class lever

100

a grooved wheel with a rope

pulley

200

what are the two conditions for work to be done on an object

force must be applied to move and in direction as applied force

200

how do machines make work easier (3 ways)

increasing force, force v distance, change direction

200

the screwdriver to open a paint can is an example of

first class lever

200

consisting of a shaft or axel attached to a wheel

wheel and axel

300

equation for work

work (joules) = appled force (newtons) x distance (meters)

W = Fd

300

the force applied by the machine

output force

300

the wheelbarrow is an example of 

2nd class lever

300

a sloping surface that reduces the amount of force required to do work

inclined plane

400

the amount of work done in one second

power

400

the force applied to the machine 

input force

400

a bar that is free to pivot or turn at a fixed point

a lever

400

an incline plane wrapped in a spiral

the screw

500

equation for power

P = W/t

Power (Watts) = work(joules)/time(seconds)

500

a measure of how much of the work put into a machine is changed into useful output

efficiency

500

the point of pivot for a lever

fulcrum

500

inclined plane with one or two sloping sides

the wedge

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