Levers
Pulleys
Gears
Friction
Machines
100
First, second, and third.
What are the three classes of levers?
100
This wheel-based, belt-driven device is designed with a number of steps.
What is a cone pulley?
100
This is a toothed wheel with rounded teeth.
What is a spur gear?
100
This effort is required to slide an object over surfaces.
What is kinetic or sliding friction?
100
This describes the rate at which work is performed.
What is power?
200
A wheelbarrow provides a good example of this lever.
What is a second class lever?
200
This is an action exerted on a body that changes the motion of that body.
What is a force?
200
This consists of two or more meshed gears.
What is a simple gear train?
200
This is the resistance to motion between two surfaces in contact.
What is friction?
200
This is a toothed wheel that is shaped to engage with a chain.
What is a sprocket gear?
300
This has a fulcrum located between the effort being applied and the resistance being moved.
What is a first class lever?
300
This can be used to maintain tension on a belt.
What is an idler pulley?
300
These are abbreviated "RPM?"
What are revolutions per minute?
300
This is a machine part used to reduce friction by using steel balls to rotate between the two surfaces.
What is a ball bearing?
300
This lever rotates 360 degrees around an axle.
What is a wheel?
400
This is the ratio of the length of the effort arm from the fulcrum divided by the length of the resistance arm from the fulcrum.
What is the ideal mechanical advantage?
400
This is the product of force multiplied by distance.
What is work?
400
With a small input gear and a large output gear, this is increased.
What is torque?
400
A surface that may be positioned at an angle above horizontal.
What is an inclined plane?
400
This is an inclined plane wrapped around a shaft.
What is a screw?
500
A shovel is an example of this.
What is a third class lever?
500
This uses a wheel to transmit power by means of a rope, cord, belt, or band.
What is a pulley?
500
This depends only upon the amount of teeth on the driving gear and the end gear.
What is the mechanical advantage?
500
This energy keeps an object from moving.
What is static or starting friction?
500
This device provides mechanical advantage and uses a hand crank or motor as the driving force.
What is a winch?
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