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# What is THE MOMENT OF INERTIA OF THE DOOR ABOUT THE HINGES?

Best Answer: Moment of Inertia, "MI" of the door about the hinges = 26*[(1/12)*{(0.99^2 + 0.04)^2} + (0.99/2)^2] or MI = 8.49767 kg m^2 0r 8.5 kg m^2 Initial Angular ...
Best Answer: I= (mass*((width^2)+(thickness^2)))/12 ----- for door I= (mass of handle* distance from hinge^2) -----for handle add em' up
The problem statement, all variables and given/known data A solid door of mass 39.30 kg is 2.34 m high, 1.68 m wide, and 3.23 cm thick. What is the moment of inertia of the door about the axis through its hinges?
1. The problem statement, all variables and given/known data A solid door of mass 25.40 kg is 2.31 m high, 1.48 m wide, and 2.58 cm thick. What is the moment of inertia of the door about the axis through its hinges?
What Is The Moment Of Inertia Of The Door About The Hinges? - Find Questions and Answers at Askives, the first startup that gives you an straight answer
A 26.0 kg solid door is 204.0 cm tall, 95.0 cm wide. What is the door's moment of inertia (in kg*m*m) for rotation about its hinges? What is the door's moment of inertia (in kg*m*m) for rotation about about a vertical axis inside the door, 15.0 cm from one edge?
A professor's office door is 0.93 m wide, 2.2 m high, 4.2 cm thick; has a mass of 24 kg, and pivots on frictionless hinges. A "door closer" is attached to door and the top of the door frame.
The bean bag hits the door a distance r from the hinges and, after the collision, has no horizontal velocity component. If the moment of inertia of the door about its hinges is I, what is the angular velocity of the door after the collision? 3 years ago; Report Abuse;
A 22 kg solid door is 220 {\rm cm} tall, 93 cm wide. What is the door's moment of inertia for rotation on its hinges? What is the door's moment of inertia for rotation about a vertical axis inside the door, 14 cm from one edge? 5 years ago;
Moment of inertia. Anonymous asked. A ... what is the moment of inertia of the door about the hinges? Neglect the contribution of hinge components to the moment of inertia. Answers (1) Answered by Anonymous 15 minutes later. Rating: 2 Stars. i guess i have already answered this one.
If the density of the plywood is 550 kg/m3, what is the moment of inertia of the door about the hinges? Neglect the contribution of hinge components to the moment of inertia. Answers (2) Answered by Anonymous 5 minutes later. Rating: 3 Stars.
The axis of rotation is through the hinges, parallel to the door's height. You can ignore the height. The width is probably negligibly small, ... moment of inertia, and torque are related by: α = τ/I So, α = 0.46 rad/s^2. 10 months ago; Report Abuse; 0% 0 Votes.
A vault is opened by applying a force of 300 N perpendicular to the plane of the door, 0.80 m from the hinges. Find the torque due to this force about an axis through the hinges. ... a constant moment of inertia. b. an angular acceleration. d.
http://www.ccphysics.us/henriques/p100/problems/Torque%20and%20Angular%20Momentum.pdf
Hinges in structures (moment releases) The torsional property of a beam can also be used to form hinges within a structure. ... The torsional moment of inertia must be zero. Again, when choosing values for A and I to constrain the lateral and vertical
http://www.ironwarrior.org/ARE/General_Structures/Notes%252054%2520-%2520Modeling%2520-%2520Hinges.pdf
A student opens a 12.0 kg door If the door is 2.00 m in height and 1.00 m wide what is the moment of inertia of the door about its hinges. ... moment inertia= sume of momentus= 1/2 3*.3^2+1/2*.1*.7^2 KE= 1/2 I w^2 solve for W Sunday, June 24, 2012 at 7:09pm by bobpursley.
http://www.jiskha.com/search/index.cgi?query=a+disk+has+a+moment+of+inertia&page=2
Best Answer: Treat the door as a rod, of length 0.95 m. If it were rotated about its central vertical axis, you would use I = 1/12 * m*L^2 to get its rotational inertia. But ...
What is the moment of inertia of this system about this axis? A) 0.980 kg·m2 B) 2.30 kg·m2 C) 0.270 kg·m2 D) 1.25 kg·m2 E) 2.00 kg·m2 9 ... The doorknob is located 0.800 m from axis of the hinges of the door. The door begins to rotate with
http://www.tutor-homework.com/Homework_Questions/Physics_Questions_0017.pdf
The moment of inertia measures how hard it is to rotate an object around an axis. ... That is why door knobs are placed far away from the door hinges. To see how the centroid and moment of inertia of a cross section might effect the way a beam bends, ...
http://www.geom.uiuc.edu/education/calc-init/static-beam/cross.html
Answer A2 Moment of inertia is the term used to measure or quantify the amount of mass located at an object's extremities. For example if all the mass of an object was located ...
When we apply the force the door turns on its hinges. Thus a turning effect is produced when we try to open the door. ... First Moment of Inertia. What is Magnetic Moment. Angular Momentum and Torque. Torque and Angular Acceleration. Torque Unit Conversion.
http://www.tutorvista.com/content/physics/physics-i/forces/moments.php
Moment of inertia is a property of rotating bodies that defines its resistance to a change in angular velocity about an axis of rotation. It is how rotation of a body is affected by Newton's law of inertia, which states "Every body perseveres in its state of being at rest or of moving uniformly ...
http://en.wikipedia.org/wiki/Figure_axis
Q A professor's office door is 0.92 {rm m} wide, 2.2 {rm m} high, 4.0 {rm cm} thick; has a mass of 30 {rm kg}, and pivots on frictionless hinges. A "door closer" is attached to door and the top of the door frame. When the door is open and at rest ... What is the moment of inertia of the door? B: ...
http://www.coursehero.com/tutors-problems/Physics/6444722-A-professors-office-door-is-092-rm-m-wide-22-rm-m-high-40/
moment of inertia of Earth as it turns on its axis? Answer: Exercise 20: Olga, the 50.0-kg gymnast, ... A-8: Most doorknobs are placed on the side of the door opposite the hinges instead of in the center of the door. a) Why is this so? b) ...
http://web2.utc.edu/~Johnny-Cantrell/cp/problemsolving/cpps0703.pdf
Topic: Science. Question: Estimate the moment of inertia of the door of the classroom.How does this... - Question #332398
http://www.enotes.com/homework-help/estimate-moment-inertia-door-classroom-332398
Calculate the moment of inertia for a mass rotating on the end of a rod. 6. Describe the relationship between torque, ... Figure 9.2: A door rotates around its hinges and a force creates the greatest torque when applied far from the hinges.
http://www.bfasta.net/assets/files/departments/science/ismith/Phys%20446/Phys%20446%20Information/HSU/Chapter%209%20Torque%20and%20Rotation.pdf
What is the moment of inertia of this system . about this axis? A. 2.30 kg∙m2 . B. 0.270 kg∙m2 . C. 1.25 kg∙m2 . ... What is the moment of inertia of the door about the hinges? A. 2.00 kg∙m2 . B. 1.00 kg∙m2 . C. 12.5 kg∙m2 . D. 8.00 kg∙m2 .
http://staffweb.mps.k12.mi.us/FawcettAM/Test%20Review%20AP%20HL/AP%20IB%20HL%20First%20Sem%20Exam%20Practice.doc
The mass moment of inertia, usually denoted I, measures the extent to which an object resists rotational acceleration about an axis, and is the rotational analogue to mass.
http://en.wikipedia.org/wiki/List_of_moments_of_inertia
The heavier a door the larger its moment of inertia and the larger a torque is required to induce a given angular acceleration. For a numerical example consider a normal wooden door with mass m=20 kg and width w=1.5 m.
http://www.pha.jhu.edu/~broholm/l18/node3.html
A hanging door is an excellent example of this type of motion. When you push on a door it can not freely translate because it is confined (or pinned) by the hinges. ... The elevators produce a pitching moment, the rudder produce a yawing moment, ...
http://wright.nasa.gov/airplane/torque.html
A sheet of plywood 1.95 cm thick is used to make a cabinet door 46.1 cm wide by 65.3 cm tall, with hinges mounted on the vertical edge. A small 209-g handle is mounted 45 cm from the lower hinge at the same height as that hinge. If the density of the plywood is 550 kg/m3, what is the moment of ...
http://www.itusozluk.com/duyurular/zor+bi+fizik+sorusu+moment+of+inertia/149362
Best Answer: Moment of inertia from the central axis is (1/12)M r^2 Parallel Axis Theorem: I = (1/12)M r^2 + M r'^2 r=95/2 r'=95/2 - 17
Intermediate Hinges in Moment Distribution Method ... carry-over factor and fixed-end moments are derived for members with variable moment of inertia. Numerical examples are given to illustrate the procedure of analysis. S.L. Lee, R.S. Harwell and F.P. Wiesinger Author(s): ...
http://www.istructe.org/journal/volumes/volume-42-(published-in-1964)/issues/issue-5/articles/intermediate-hinges-in-moment-distribution-method
The 1.00-m-wide door is free to swing on its hinges. (c) At what angular speed does the door swing open immediately after the collision? (The door has the same moment of inertia as a rod with axis at one end.) (d) ...
What is the moment of inertia of this system of masses about the x-axis? a. ... the door opens outward. If the hinges on the door are on your right, what is the direction of the angular velocity of the door as you open it? a. up: b. down: c. to your left: d.
http://www.croomphysics.com/index.php?p=pretest&sub=pretest_7
How did the force required to move the door vary as you moved toward the hinges? ... the moment of inertia will be the same as that of a rod rotating about an axis at its end.* If the mass of the door is 10 kg and its width is 1.5 m, ...
http://www.studentoffortune.com/question/1210925/PHYS-310-lab-14-TORQUE-AND-ROTATION-NO-TABLE
If you exert a force at the hinge, the door will not move; the easiest way to open a door is to exert a force on the side of the door opposite the hinge, and to push or pull with a force perpendicular to the door. ... Moment of inertia.
http://physics.bu.edu/~duffy/py105/Torque.html
-Calculation of Moments of Inertia for Rigid Objects of Different Geometries ... Example #25 A uniform thin solid door has height 2.20m, width 0.870m and mass 23.0kg. Find its moment of inertia fro rotation on one hinge across its bottom.
http://sites.tenafly.k12.nj.us/~hcoyle/AP%20Physics%20%20C%20Power%20Points/6%20APC%20Rotation%20Ch%2010/3%20AP%20Calculation%20of%20Moments%20of%20Inertia%20for%20Rigid%20Objects%20of%20Different%20Geometries%20and%20Parallel%20Axis%20Theorem.ppt
Inertia. Resistance. Energy. These terms hold much clout in the world of physics. ... A heavy door hung on hinges could have difficulty meeting this requirement. Fighting the laws of physics can easily become a loosing battle.
... imbedding itself 10.1 cm from the side opposite the hinges as in the figure below. The 1.00-m-wide door is free to swing on its hinges. ... (The door has the same moment of inertia as a rod with axis at one end.)
Moment of Inertia (Mass Moment of Inertia) depends on the mass of the object, its shape and its relative point of rotation
http://www.engineeringtoolbox.com/moment-inertia-torque-d_913.html
A force of 4.0 N is applied to a door at an angle of 60.0 ... heavy bank-vault door is opened by the application of a force of 3.0 ´ 10 2 N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. ... The moment of inertia of the cylinder and crank is 0.12 kg ...
Therefore we introduce a new quantity called the moment of inertia to measure resistance to angular acceleration. ... an engineer is told to double the width of a revolving door. By how much will this increase the moment of inertia? ...
http://www.geom.uiuc.edu/education/calc-init/static-beam/moments.html
How do the moment of inertia for the two objects compare? ... when you push on the door close to the door knob or when you push on the door close to the hinges (the strength of the push is the same in each case)? Explain briefly.
Door hinges. There are many types of door hinges. The main types include: ... When no bending stresses are transmitted across the hinge it is called a zero moment hinge. Other hinges Butler tray hinge Fold to 90 degrees and also snap flat.
http://en.wikipedia.org/wiki/Door_hinge
What is the door's moment of inertia for rotation about a vertical axis inside the door, 17 cm from one edge? View Full Answer Ask a new Question. Related Questions. A solid sphere of radius 40 ...
http://www.coursehero.com/tutors-problems/Physics/7026553-A-21-kg-solid-door-is-220-cm-tall-94-cm-wide-What-is-the-doors-mome/
As an example, think about why doorknobs are always on the edge of the door away from the hinges. With doorknobs in their regular locations, opening or closing a door is an ... the equivalent moment of inertia is $\small{I = mr^2}$.
http://www.4physics.com/phy_demo/newton/newton_rot.htm
How did the force required to move the door vary as you moved toward the hinges? ... the moment of inertia will be the same as that of a rod rotating about an axis at its end.* If the mass of the door is 10 kg and its width is 1.5 m, ...
http://www.studentoffortune.com/question/1300863/Experiment-1-Open-Door-TorqueQuestion
computing the moment of inertia), but on the whole, it is very similar to what we’ve already done with linear motion. ... For example, the axis of rotation of the door in the door is the line going through the hinges. From the aerial view, this line just looks like a point, ...
http://rockpile.phys.virginia.edu/arch15.pdf
Problem What would the moment of inertia be for a door of width Rif the center of rotation were around the middle (i.e. a revolving door)? Answer Just think of a revolving door as two doors, of width R=2 and mass M=2 each, attached in the center.
http://rockpile.phys.virginia.edu/arch16.pdf
This Video shows the OmniRob swinging a door open. The door's geometry is assumed to be known, but the friction and moment of inertia is learned during the manipulation.