What is the angular speed, number of revolutions and linear speed per second of a point on the rim of a
wheel with a diameter of 14 cm that travels at 9 dm per minute?

• linear speed is 9 dm per minute    9 decimeters x 10 = 90 cm per minute ÷ 60 = 1.5 cm per sec


• circumference = diameter x π → c = dπ →  c = 14π cm
• number of revolutions = 1.5 cm per sec ÷ 14 cm π = .034 revolutions per second


• angular speed  =  2π x .034 = 0.2136 radians per second

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