Manual

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17. Newton’s First Law of Motion

Build the circuit on the left; press and hold the press

switch (61) and the motor (95) will start spinning.

Release the press switch (61), the motor will slow

down and nally stop due to friction within it. This

demonstrates Newton’s First Law of Motion: An

object either remains at rest or continues to move

at a constant velocity, unless acted upon by a force.

18. Magnet-controlled Motor

Build the circuit, move the magnet (7) towards the

reed switch (83) and the motor (95) will turn on.

Move the magnet (7) away and the motor (95) will

turn off. A reed switch is typically made from two

or more ferrous reeds (thin strips) encased within

a small glass tube-like envelope, which become

magnetized and move together or separate when a

magnetic eld is moved towards the switch.

WARNING: Moving parts. Do not

touch the motor during operation. Do

not lean over the motor.

1st level