Cam Toy with a Turning Handle

In the picture

1. 1The handle on the axle: turning it makes the axle spin.
2. 2The egg-shaped cam on the axle: its changing edge lifts the stick.
3. 3The vertical stick and paper bird: they move up and down as the cam turns.

Examples

• A car engine’s camshaft opens and closes valves.
• A wind-up toy makes a small figure bob up and down.

Quiz: Cam Toy with a Turning Handle (Age 9)

1. 1

   What does a cam do in a toy like this?

   • It changes turning motion into up-and-down motion.
   • It changes up-and-down motion into turning motion.
   • It keeps everything completely still.
2. 2

   In the cam toy, what pushes the stick up and down?

   • The paper bird flapping its wings.
   • The turning egg-shaped cam.
   • The handle staying still.
3. 3

   What decides how the follower (the stick) moves?

   • The shape of the cam.
   • The size of the paper bird.
   • The colour of the box.

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.