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Simple Machines
Work and Power
M.A, Eff. and Stuff
Simple Machine Continued
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100
A machine that has one moving part.
What is a simple machine?
100
What are the units for Work and Power respectively?
What are Joules and Watts?
100
If a machine gives you a mechanical advantage of 2 this means the output force is larger/smaller than the imput force.
What is larger?
100
A flag pole is an example of this type of simple machine.
What is a pulley?
100
The equation of work
What is W= F x d
200
A simple machine that uses a fulcrum.
What is a lever?
200
The work done if someone pushes a car with a force of 300 N and the car does not move.
What is 0 joules?
200
A machine with 100% efficiency is known as a(n) ___________.
What is an ideal machine.
200
When you twist on a bottle cap you are using this simple machine.
What is a screw?
200
An inclined plane wrapped around a cylinder.
What is a screw?
300
A moving inclined plane.
What is a wedge?
300
A man pushes a box exerting a force of 50 N. The crate moves 10 m. What is the amount of work done?
What is 500 Joules?
300
If the input work for a machine is 100 Joules and the output work is 68 Joules, what is the efficiency of the machine is %.
What is 68%?
300
Give an example of a compound machine.
What is a bicycle? What is a pair of scissors?
300
How do you find the mechanical advantage of an inclined plane?
Divide the length (effort) by the height ( resistance)   (L/H)
400
The mechanical advantage of this simple machine is found by taking the outer radius divided by the inner radius.
What is a wheel and axle?
400
An individual does 99 Joules of work in 3 Seconds. What is the power?
What is 33 watts?
400
Name two simple machines that use inclined planes.
What are the wedge and screw?
400
If you are trying to lift a heavy object with a lever would you want the fulcrum closer to the input force or the output force?
What is the output force?
400
Equation for Power
What is P= W/t
500
This is the most simple type of simple machine. Is usually used while stationary.
What is an inclined plane?
500
If a weight lifter presses a 100 N weight, 3 m over his head in 2 seconds, this is the power of the weight lifter.
What is 150 watts?
500
How do you find the MA of a pulley that is pulling up? 
Count the number of rope segments
500
Name two simple machines used to make a simple can opener.
What is a lever, wedge, or wheel and axle?
500
A wheel barrow is what type of lever
What is a second class lever?