Cams and pulleys | Design and technology | Quizalize & Oak National Academy

Starter quiz

A bike wheel turning around is an example of which type of motion?
- rotary ✓
- linear
- reciprocating
- oscillating
Tweezers are an example of which type of lever?
- first order lever
- second order lever
- third order lever ✓
Increasing the length of the handles would make it ______ to cut through a piece of fabric.
- 'easier' ✓
The distance from one side of a circle to the other going through the centre, is known as the ...
- 'diameter' ✓
What does a simple cam do when it turns?
- It makes parts move up and down. ✓
- It stores energy.
- It keeps parts in one place.
Why would you use a pulley in a machine?
- to make the machine look nicer
- to lift heavy objects more easily ✓
- to reduce the weight of the machine
- transfer motion from one place to another ✓

This is the inside of a pillar drill. The yellow rings in the centre right, are examples of a ...
- pulley wheel ✓
- belt
- cam
- follower
- motor
The motion of the follower using a __________ shaped cam gradually rises and then suddenly falls.
- pear
- eccentric
- snail ✓
Rotary motion in cams is changed into which motion in followers?
- linear
- reciprocating ✓
- oscillating
Match the motion to the product:
- linear
  
  ⇔
  
  car driving along a road ✓
- reciprocating
  
  ⇔
  
  sewing machine needle ✓
- rotary
  
  ⇔
  
  ferris wheel ✓
- oscillating
  
  ⇔
  
  swing ✓
______ occurs when two things rub together.
- 'friction' ✓

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The larger the diameter of a pulley wheel, the higher the output speed.

The smaller the pulley wheel, the quicker it will complete a rotation, therefore increasing the output speed.

Cam - a mechanical component that converts rotary motion into linear motion
Follower - a part of a machine that moves up and down or back and forth when it touches a cam
Friction - resistance which is encountered when two things rub together
Pulley - a grooved wheel over which a belt can run