How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask walkereng Your Own Question

walkereng
walkereng, Bachelor's Degree
Category: Engineering
Satisfied Customers: 59
Experience:  Structural Engineer with over 30 years of experience.
61772417
Type Your Engineering Question Here...
walkereng is online now

1. (a) mechanism shown in FIGURE 1 determine

Customer Question

1. (a) For the mechanism shown in FIGURE 1 determine for the angle θ = 45°: (i) the velocity of the piston relative to the fixed point O (VBO) (ii) the angular velocity of AB about point A (i.e. ωAB) (iii) the acceleration of point B relative to A (aBA). Note: Link AB is horizontal when θ = 45°
(b) Determine the value of the angle θ (measured from vertical ) when:
(i) the velocity of point B = 0
(ii) the angular velocity of link AB a maximum.
(c) What is the maximum angular velocity of link AB?
2. (a) A shaf t 2 m lon g rotate s a t 150 0 rev s min – 1 between bearings as shown in FIGURE 2 . The bearings experience forces of 5kN and 3kN acting in the same plane as shown. A single mass is to be used to balance the shaft, so that the reactions are zero. The mass is to be placed at a radius of 200 mm from the shaft centre, 180° from the direction of the bearing reactions. Determine the size and position (a and b) of the mass to be used.
(b) The shaft in part (a) is to be balanced using two masses (m1andm2) placed 0.5m and 1.5m from end A and 180° from the direction of the bearing reactions, each on radius arms 100mm long.Calculate the sizes of m1 and m2.
3. A gearbox and flywheel are as shown in FIGURE 4. The output shaft rotates in the opposite direction to the input shaft at 5 times its speed. The gearbox has an efficiency of 92%. If the flywheel is solid, has a mass of 50 kg, a diameter of 1.5 m and is to accelerate from rest to 300 revs min–1 in 1 minute:
(a) Calculate the torque required at input T1.
(b) Calculate the magnitude and direction of the torque required to hold the gearbox stationary (holding torque Th). Show the direction of the holding torque applied to the shaft with the aid of a sketch.
(c) Plot a graph of the input power against time when taking the flywheel from rest to 300 revs min–1.
Submitted: 8 months ago.
Category: Engineering
Expert:  Michael Hannigan replied 8 months ago.
Hello. Thank you for coming to JustAnswer.Sorry for the wait. My name is Michael. I will be helping you with your question today.
Expert:  Michael Hannigan replied 8 months ago.
After reviewing your question, I think it could be best handled by someone in the HOMEWORK category. I'll transfer it now.
Expert:  adamd-mod replied 8 months ago.
Hello there,
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.
Please note, I am just a moderator for this category, I can only try and find experts to help, I can't answer the question itself.
Thank you!
Adam

What Customers are Saying:

 
 
 
  • My Expert answered my question promptly and he resolved the issue totally. This is a great service. I am so glad I found it I will definitely use the service again if needed. One Happy Customer
< Previous | Next >
  • My Expert answered my question promptly and he resolved the issue totally. This is a great service. I am so glad I found it I will definitely use the service again if needed. One Happy Customer
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
 
 
 

Meet The Experts:

 
 
 
  • walkereng

    walkereng

    Bachelor's Degree

    Satisfied Customers:

    59
    Structural Engineer with over 30 years of experience.
< Last | Next >
  • http://ww2.justanswer.com/uploads/WA/walkereng/2012-2-2_4226_Brad2.64x64.jpg walkereng's Avatar

    walkereng

    Bachelor's Degree

    Satisfied Customers:

    59
    Structural Engineer with over 30 years of experience.
  • http://ww2.justanswer.com/uploads/ST/StructuralEng/2013-9-10_61545_struct.64x64.jpg StructuralEng's Avatar

    StructuralEng

    Bachelor's Degree

    Satisfied Customers:

    25
    Engineering Expert
  • /img/opt/shirt.png ibosley's Avatar

    ibosley

    Master's Degree

    Satisfied Customers:

    85
    Mechanical Engineering
  • http://ww2.justanswer.com/uploads/VG/vgdlpc/2012-1-17_235838_VICENTEPHOTO.64x64.jpg vgdlpc's Avatar

    vgdlpc

    Master's Degree

    Satisfied Customers:

    17
    Civil Engineer, Major in Structures and Foundations. Professional Engineer 11 years of experience.
  • http://ww2.justanswer.com/uploads/MS/MsAM/2012-6-9_16426_anna.64x64.jpeg Anna's Avatar

    Anna

    Teacher, writer, biologist

    Satisfied Customers:

    270
    Great research skills, variety of work experiences, teaching experience.
  • http://ww2.justanswer.com/uploads/PD/pdheslin/2012-6-6_232056_pambig.64x64.jpg pdheslin's Avatar

    pdheslin

    Consultant

    Satisfied Customers:

    51
    20+ years of internet site creation and search engine optimization. Dozens of search tools at my disposal.
 
 
 

Related Engineering Questions