Simple vs Compound
Class Levers
Wedgies & Ramps
Ropes & Pulleys
Wheels & Axles
100
something that helps us do work
What is a simple machine?
100
a seesaw is one example
What is a first class lever?
100
we see them all around us in the form of a ramp
What is an inclined plane?
100
when we open the window blinds or ride an elevator we use one
What is a pulley?
100
two round objects that move together to make work easier
What is a wheel & axle?
200
it's opposite is output force
What is input force?
200
a hammer is one example
What is a third class lever?
200
a ramp increases the distance but this stays the same
What is the amount of work?
200
it is attached to the ceiling and has a rope running through it
What is a fixed pulley?
200
we use this wheel and axle to enter the room
What is a doorknob?
300
it's made of at least two simple machines
What is a compound machine?
300
a wheelbarrow with the load in the middle is an example.
What is second class lever?
300
it's just two inclined planes that are back to back
What is a wedge?
300
these are pulleys that are attached to the load
What is moveable pulley?
300
this wheel and axle is found in every automobile in America and helps us control where we go.
What is a steering wheel?
400
all simple machines have this pivotal spot
What is a fulcrum?
400
the fulcrum is at one end and the force is in the middle
What is a third class lever?
400
it is an inclined plane wrapped around a cylinder
What is a screw?
400
this means that there is both moveable and fixed pulleys working together
What is a block and tackle?
500
it's found in every kitchen and made of a lever, a wheel and axle and a wedge
What is a can opener?
500
with this lever, the load is in the middle and moves in the same direction as the input force.
What is a second class lever?
500
a wedge has a greater mechanical advantage if it is longer and this
What is thinner?
500
you calculate it by counting all the sections of rope
What is mechanical advantage?
500
divide the radius of the wheel by this to determine the mechanical advantage of the wheel & axle
What is the radius of the axle?
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