What is Work?
How Machines Do Work
Inclined Planes and Wedges
Screws and Levers
Wheels and Axles and Pulley
100
These two things must be done in the same direction when work is being performed.
What are force and direction?
100
This is a device that allows you to work in a way that is easier.
What is a machine?
100
This is a flat, sloped surface
What is an inclined plane?
100
This is the definition of a screw.
What is an inclined plane wrapped around a cylinder?
100
This is the definition of a wheel and axle.
What is two cylindrical objects fastened together that rotate about a common axis?
200
This is the formula for work.
What is work = force x distance?
200
This is the force you exert on a machine.
What is input force?
200
This is a device that is thick at one end and tapers to a thin edge at the other.
What is a wedge?
200
This is the mechanical advantage formula for a screw.
What is mechanical advantage = length of threads/length of screw
200
This is the mechanical advantage formula for a wheel and axis.
What is mechanical advantage = Radius of wheel/Radius of axle
300
This is the rate at which work is done.
What is power?
300
This is the formula for calculating efficiency
What efficiency = output work/input work x 100%
300
This is the ideal mechanical advantage formula for an inclined plane.
What is ideal mechanical advantage = length of incline/height of incline?
300
These are the three types of lever.
What are first-class, second-class, and third-class?
300
This is the definition of a pulley.
What is a grooved wheel with a rope or cable wrapped around it?
400
This is the SI unit for work.
What is a joule?
400
These are the three ways machines make work easier.
What are changing force, changing direction and changing distance?
400
This is the formula for the ideal mechanical advantage of a wedge.
What is ideal mechanical advantage = length of wedge/width of wedge
400
In this type of lever, the input force and output force are in opposite directions.
What is a first-class lever?
400
These are the three types of pulley.
What are fixed pulley, moveable pulley, and block and tackle.
500
This is the SI unit for power.
What is a watt?
500
This is the number of times a machine increases a force exerted on it.
What is mechanical advantage?
500
When using a wedge, this is the number of directions that the output force is exerted.
What is 2?
500
This is the mechanical advantage formula for a lever.
What is ideal mechanical advantage = Distance from fulcrum to input force/Distance from fulcrum to output force.
500
This is how the mechanical advantage of a pulley is calculated.
What is by counting the number of sections of rope that support the object?
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