Simple Machines Flashcards

1
Q

Simple Machine

A

A device that allows the user to multiply a force or a distance

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2
Q

First Class Lever

A

Fulcrum located between the effort and the resistance

Used to gain a mechanical advantage

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3
Q

Second Class Lever

A

Resistance located between the fulcrum and the effort

Used to gain a mechanical advantage

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4
Q

Third Class Lever

A

Effort located between the fulcrum and the resistance

Used to gain a distance advantage rather than a mechanical advantage

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5
Q

Lever Equation

A

Mechanical Advantage = Resistance / Effort = Effort Arm / Resistance Arm

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6
Q

Pulleys

A

Mechanical Advantage is directly proportional to the number of ropes supporting the load

Used to gain a mechanical advantage

A pulley system usually consists of at least a traveling block and a stationary block with a length of rope strung between them

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7
Q

Single Fixed Pulley

A

Used to change the direction of the applied force

MA = 1:1

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8
Q

Single Movable Pulley

A

Effort rope comes off the movable pulley and is considered a support rope

MA = 2:1

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9
Q

Multiple Pulley System

A

If the effort rope comes off the fixed pulley, it does not add to mechanical advantage

Count the number of ropes that come off the movable pulley

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10
Q

Multiple Pulley

A

If the effort rope comes off the movable pulley it is considered a support rope, then count it as part of the mechanical advantage

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11
Q

Gears

A

Used to gain a mechanical advantage, change speed, change direction of rotation, change torque

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12
Q

Idler Gear

A

The purpose of the idler gear is to allow the drive and driven gear to rotate in the same direction

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13
Q

Incline Plane

A

Offers a mechanical advantage

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14
Q

Incline Plane Equation

A

MA = Run (L) / Rise (I) = R / E = L / I

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15
Q

Gear Equation

A

MA = Driven Teeth / Drive Teeth = Drive RPM / Driven RPM = Driven Torque / Drive Torque

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