Q2. A child applies the brakes on a bicycle by applying a downward force of 20 pounds on the pedal when the crank makes a 40 degree angle with the horizontal as shown. The crank is 6 inches in length. Find the torque at P. 6 in. F = 20 lb

Q2. A child applies the brakes on a bicycle by applying a downward force of 20 pounds on the pedal when the crank makes a 40 degree angle with the horizontal as shown. The crank is 6 inches in length. Find the torque at P. 6 in. F = 20 lb

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter9: Statics And Torque

Section: Chapter Questions

Problem 1PE: (a) When opening a door, you push on it perpendicularly with a force of 55.0 N at a distance of...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

Q2. A child applies the brakes on a bicycle by applying a downward force of 20 pounds on
the pedal when the crank makes a 40 degree angle with the horizontal as shown. The crank is
6 inches in length. Find the torque at P.
6 in.
Jockey
40°
F = 20 lb

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