Technical Vocabulary for Edexcel GCSE D&T topic 1.5 Mechanisms
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linear |
Linear motion is moving in a straight line in one direction.
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reciprocating |
Reciprocating motion is moving back and forth, up and down, in a straight line.
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oscillating |
Oscillating motion is moving back and forth in an arc.
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rotary |
Rotary motion is moving in one direction around a central point or pivot.
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mechanism |
Dampers help to control shock in a vehicles suspension mechanism.
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velocity |
Velocity is speed in a particular direction.
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efficiency |
The efficiency of a mechanism is reduced by friction.
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crank |
A crank and slider converts rotary motion into reciprocating motion, or the other way round..
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reverse |
You will need to reverse your car out of the drive.
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linkage |
A linkage uses is a special lever that changes the direction of motion.
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cam |
A cam and follower converts rotary motion into reciprocating motion.
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follower |
A cam and follower converts rotary motion into reciprocating motion.
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eccentric |
Eccentric means off centre, so an eccentric cam is a circular cam that runs off centre.
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dwell |
Dwell means a period of pause when looking at the movement of a cam and follower.
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lift |
A cam's lift is the amount the cam's follower will rise and fall.
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camshaft |
A camshaft is a rotating axle that cams are fixed to.
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pulley |
A pulley can be used to lift a heavy weight.
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belt |
A belt can be used with two pulley wheels to transfer rotary motion and change its speed.
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gear |
A gear is a toothed wheel that meshes with another gear to create a gear train.
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fulcrum |
A fulcrum is the pivot point around which a lever rotates or oscillates.
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* This sentence was added by a Spellzone user.
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