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Mechanisms

Mechanisms. Types of motion. Linear (straight lines only, e.g. Pillar Drill) Rotary (revolving around a fixed point) Reciprocating (up/down, in/out, backwards and forwards e.g. Fret Saw, Piston, Lift) Oscillating. Classes of Lever. Class 1 Class 2 Class 3. Load xN. Effort 10N. 4 m.

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Mechanisms

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  1. Mechanisms

  2. Types of motion • Linear (straight lines only, e.g. Pillar Drill) • Rotary (revolving around a fixed point) • Reciprocating (up/down, in/out, backwards and forwards e.g. Fret Saw, Piston, Lift) • Oscillating

  3. Classes of Lever • Class 1 • Class 2 • Class 3

  4. Load xN Effort 10N 4 m 1 m Load yN Effort 10N Fulcrum 1 m 4 m Fulcrum Lever Mechanisms

  5. Mechanical Advantage Load • Mechanical Advantage = Effort Load 40N Effort 10N 4 m 1 m

  6. Velocity Ratio Distance moved by Effort • Velocity Ratio = Distance moved by Load Load 40N Effort 10N 4 m 1 m 200mm 50mm

  7. Efficiency M.A. • x 100% V.R. Efficiency = Load 40N Effort 10N 4 m 1 m 200mm 50mm

  8. Lever Mechanism What load can this person lift?

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