A bicycle with 0.80 m-diameter tires is coasting on alevel road at 5.6 m/s. A sm

Question

A bicycle with 0.80 m-diameter tires is coasting on alevel road at 5.6 m/s. A small blue dot has been painted onthe tread of the rear tire. a) What is the angularspeed of the tires? Express your answerusing two significant figures. b)What is the speed of theblue dot when it is 0.80 m above the road? c)What is the speed of theblue dot when it is 0.40 m above the road? A bicycle with 0.80 m-diameter tires is coasting on alevel road at 5.6 m/s. A small blue dot has been painted onthe tread of the rear tire. a) What is the angularspeed of the tires? Express your answerusing two significant figures. a) What is the angularspeed of the tires? Express your answerusing two significant figures. b)What is the speed of theblue dot when it is 0.80 m above the road? c)What is the speed of theblue dot when it is 0.40 m above the road? b)What is the speed of theblue dot when it is 0.80 m above the road? c)What is the speed of theblue dot when it is 0.40 m above the road? c)What is the speed of theblue dot when it is 0.40 m above the road?

Explanation / Answer

    Linear velocity of center of mass , V = 5.6m/s     radius of the wheel, r = d / 2 = 0.4 m (a)     angular speed, = V / r = 5.6 / 0.4 = 14rad / s (b)     height = 0.8 m above the ground i.e at thehighest point     speed of the dot = 2 V = 2 * 5.6=   11.2 m/s (c)      height = 0.4 m above the ground     speed of the dot = 2 V = 2 * 5.6= 7.92 m/s

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