Question: The class in Room 101 prepares their traditional greeting for a substitute teacher. Ten toy cars are wound up and released as the teacher arrives.

The class in Room 101 prepares their traditional greeting for a substitute teacher. Ten toy cars are wound up and released as the teacher arrives. The cars have the following speeds.

Calculate

(a) The average speed, and

(b) The rms speed of thecars.

Speed, m/s 2 5 6 8 Number of cars 3 3 3 1

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