Question
question 7
4. that is connected to a motor. (a) If the elevator moves down at 0.50 m/s, what is the angular speed of the drum? (b) If the elevator moves down 6.0 m, how many revolutions has the drum made? (c) What is the drum's 5.2 12 frequency of rotation? 5. A wheel of radius 30 cm is rotating at a rate of 2.0 revo- lutions every 0.080 s. (a) Through what angle, in radi- ans, does the wheel rosate in 1.0 s? (b) What is the linear speed of a point or e wheel's rim? (c) What is the 14 wheel's frequency of rotation? 6. A soccer ball of diameter 31 cm rolls without slipping at a linear speed of 2.8 m/s. (a) Through how many rev- olutions has the soccer ball turned as it moves a linear distance of 18 m? (b) What is the ball's angular speed? 1. A bicycle is moving at 9.0 m/s. What is the angular speed of its tires if their radius is 35 cm? (cornect tuto- 7. A bic
Explanation / Answer
Given that
A bicycle is moving at a speed (v) =9m/s
The radius of the tire(r) =35cm =0.35m
The angular speed of the tire is given by the equation
v=rw
Then angualr speed (w) =v/r =9/0.35 =25.714rad/s
