The length of a bicycle pedal arm is 0.165 m, and a downward force of 149 N is applied to the pedal by the rider. What is the magnitude of the torque about the pedal arm's pivot when the arm is at an angle of (a)42.8°, (b) 90°, and (c) 180° with the vertical?

The length of a bicycle pedal arm is 0.165 m, and a downward force of 149 N is applied to the pedal by the rider. What is the magnitude of the torque about the pedal arm's pivot when the arm is at an angle of (a)42.8°, (b) 90°, and (c) 180° with the vertical?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter12: Rotation I: Kinematics And Dynamics

Section: Chapter Questions

Problem 20PQ: A wheel starts from rest and in 12.65 s is rotating with an angular speed of 5.435 rad/s. a. Find...

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Question

The length of a bicycle pedal arm is 0.165 m, and a downward force of 149 N is applied to the pedal by the rider. What is the
magnitude of the torque about the pedal arm's pivot when the arm is at an angle of (a)42.8°, (b) 90°, and (c) 180° with the
vertical?
(a) Number
(b) Number
(c) Number
i
Units
Units
Units
>

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Step 1: Given data

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Step 2: Define Torque.

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Step 3: Calculation for magnitude of torque for case(a).

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Step 4: Calculation for magnitude of torque for case(b).

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Step 5: Calculation for magnitude of torque for case(c).

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