OCR · Design and Technology · J310
GCSE Design and Technology: How do we introduce controlled movement to products and systems?
Technical understanding · OCR GCSE Design and Technology (J310), specification point 6.3. Cards are generated from the exam board's own specification for "How do we introduce controlled movement to products and systems?", and every card links back to the page it came from. Specification © OCR — used with attribution.
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What type of motion turns around a fixed axis, like a wheel?
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Rotary motion.
What is linear motion?
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Movement in a straight line in a single direction, e.g. a drawer sliding out.
What is oscillating motion?
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Swinging back and forth along an arc about a pivot, e.g. a pendulum or windscreen wiper.
What is reciprocating motion?
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Repeated back-and-forth movement in a straight line, e.g. a piston or a jigsaw blade.
How does oscillating motion differ from reciprocating motion?
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Oscillating swings back and forth along a curved path about a pivot; reciprocating moves back and forth in a straight line.
The fixed pivot point about which a lever turns is called the ?.
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fulcrum
In a lever system, what is the 'effort'?
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The force applied by the user to the lever in order to move the load.
In a lever system, what is the 'load'?
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The object or resisting force that the lever has to move or lift.
What type of motion does a cam convert rotary motion into?
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Reciprocating motion — the follower resting on the cam moves up and down as the cam turns.
In which directions do two meshing gears rotate?
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In opposite directions — each gear reverses the rotation of the one driving it.
What is the function of a pulley and belt system?
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To transmit rotary motion between two shafts; different pulley sizes change the output speed.
What is a linkage in a mechanical system?
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A set of connected bars or levers that transfers force or motion from one part of a mechanism to another, often changing its direction.
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