Logo
Home Study Material Contact Search
AI Chat FREE
  1. engineering
  2. mechanical engineering
  3. 1) a prototype disk brake for a bicycle is to be m

1) A prototype disk brake for a bicycle is to be mounted on the hub of...

60.1K

Verified Solution

Question

Mechanical Engineering

1) A prototype disk brake for a bicycle is to be mountedon the hub of the rear wheel, and consists of a pair of pads ofarea 5cm × 1cm which are pressed against opposing faces of thesteel disk. The pads are aligned with their longer dimension in thetangential rotation direction, with the pad centres at a distanceof 10cm from the centre of the disk. The brake is to be tested on arotating machine to simulate the loading and wear in service. Thedisk rotates at a suitable constant speed, and the brakes areapplied for 10 seconds every minute, with each pad applying anormal load of 1 kN.

(a) Find a suitable rotation speed (in revs. per minute,rpm) if the test is to simulate braking a bicycle travelling at aspeed of 20km/hour, with a wheel diameter (including the tyre) of70cm.

(b) When the brakes are applied, the machine registersan increase in torque of 30 Nm. Find the friction force that isbeing applied to each pad, and hence estimate the frictioncoefficient.

(c) Estimate the depth of material removed per hour oftesting, if the Archard wear constant for the materials is ka =2×10-8 MPa-1.

(d) What other factors would influence the wear rate inservice?

Answer & Explanation Solved by verified expert
3.8 Ratings (396 Votes)
    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Biology
1.2K views

An annotated diagram that identifies a possible treatment and explains the steps needed to apply the...

Medical Sciences
1.2K views

Draw the graph of all of the hormones involved in the female menstrual cycle. Using this...

General Management
1.2K views

Define / describe Delegation vs Implementing Self-Managed Teams. How should leaders adjust in style for Delegation vs Self-Managed...

Physics
1.2K views

When a conductor is rotated in perpendicular magnetic field then its free electrons initially 1...

Physics
1.2K views

A vertical dam on a large lake is 30 ft tall and 60 ft wide...

Basic Math
1.2K views

1 For sample values x X X the sample variance is s n 1 a...

Basic Math
1.2K views

Assignment Vectors 6 1 Score 20 100 1 12 answered Question 1 An airplane needs...

Calculus
1.2K views

Approximate the area under the graph of f(x) = 0.05x^4 -3.61x +95 over the interval...

Calculus
1.2K views

14 For each of the problems below rewrite it as a missing factor multiplication question...

Algebra
1.2K views

Question w much of a n 70 orange ju at is 50 orange juice

Accounting
1.2K views

17. Health psychology focuses on A. how people grow and change throughout their lives. B....

Accounting
1.2K views

Cambi Company began operations on January 1, 2016. In the second quarter of 2017, it...