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Observation

It  was observed that  as the motor rating and size increases, the amount of friction power increases.

Measurement

Friction losses and motor rating

30W

50W

70W

100W

DC Volt (V)

12.0

12.0

12.0

12.0

DC Current (A)

0.22

0.31

0.42

0.63

Power (V) x Current (W)

2.64

3.72

5.04

7.56

Time (seconds)

3.33

2.78

2.66

2.81

Friction loss (W)

0.79

1.34

1.89

2.63

The materials required for this science project:

DC motors science project

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Complexity level:
9
Project cost ($):
160
Time required:
1 hour to prepare, 1 day for the science project experiment
Material availability:
Motors will have to be purchased from an appropriate hobby store
Safety concerns:

Handle all electrical devices and motors with care to prevent electric shock/injury from moving parts. The assistance and supervision of a suitably qualified adult is required.