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40 Cards in this Set
- Front
- Back
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What is the MA for a Lever?
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load/
effort effort distance/ load distance |
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What is the MA for a Pulley?
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load/
effort count the number of supporting strands |
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What is the MA for a Gears?
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number of teeth on driven gear/
number of teeth on driving gear |
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What is the MA for a Sheaves?
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driving diameter/
driven diameter |
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What is the MA for a Inclined Plane?
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horizontal length/
vertical rise |
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What is the MA for a Wheel & Axel
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radius of wheel/
radius of axle |
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speed of pulleys in a system
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speed1 x diameter1 = speed2 x diameter2
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when a gas is compressed
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it heats up
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when a given amount of gas expands
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its pressure drops & the gas cools
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when a gas cools without a change in outside pressure
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it loses volume
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water pressure law:
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total flow through a pipe system is the same everywhere
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when liquid speeds up
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pressure falls
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when liquid slows down
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pressure rises
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class 1 lever
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examples of class 1 levers
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seesaw, scissors
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examples of class 2 levers
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wheelbarrow
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examples of class 3 levers
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tweezers, tongs, human forearm
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class 2 lever
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class 3 lever
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gear
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chemical energy
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energy stored in chemicals or released in a chemical action
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compound machine
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a machine made up of two or more simple machines working together
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compression
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a force that pushes materials together
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effort
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in a lever, the point where you apply force
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effort arm
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in a lever, the distance from the force to the fulcrum
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electrical energy
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energy in moving electrons
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flexibility
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the ability of a material to bend without breaking
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friction
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the force the resists the relative motion of two surfaces in contact
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fulcrum
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the stationery element that holds a lever but also allows it to rotate
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gravity
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an attractive force between objects
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kinetic energy
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energy in a moving object
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load
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in a lever, the distance from the load to the fulcrum
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load arm
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in a lever, the distance from the load to the fulcrum
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mechanical advantage
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the amount by which a machine multiplies the force applied to it
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potential energy
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energy that can be released under certain conditions
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tension
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a force that pulls materials apart
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what are the six types of simple machines
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lever, wheel and axle, pulley, inclined plane, wedge, and screw
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torque formula for lever
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weight x distance from the fulcrum
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formula for speed
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distance divided by time
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how much work can a 1 hp machine do in one second
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550 ft. lb.
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