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shemer77
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the answer for a is .571 rad/sA boy is on a Ferris wheel, which takes him in a vertical circle of radius 7.9 m once every 11.0 s.
(a) What is the angular speed of the Ferris wheel?
(b) Suppose the wheel comes to a stop at a uniform rate during one quarter of a revolution. What is the angular acceleration of the wheel during this time? (Enter the magnitude of the angular acceleration.)
(c) Calculate the tangential acceleration of the boy during the time interval described in part (Enter the magnitude of the tangential acceleration.)
for b, I am not sure do i use like kinematics?? and I am lost on c?
Consider a 55-cm-long lawn mower blade rotating about its center at 3040 rpm.
(a) Calculate the linear speed of the tip of the blade.(b) If safety regulations require that the blade be stoppable within 3.0 s, what minimum angular acceleration will accomplish this? Assume that the angular acceleration is constant.
If feel a is velocity = distance/time so is it 2pi*3040/60? and not sure on b either.Sorry these are a lot of questions, but i am trying to learn and get an A, so i want to make sure I get all of these down.
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