Engineering ratios

Motion ratio

The motion ratio of a mechanism is the ratio of the displacement of the point of interest to that of another point. The most common example is in a vehicle's suspension, where it is used to describe the displacement and forces in the springs and shock absorbers. The force in the spring is (roughly) the vertical force at the contact patch divided by the motion ratio, and the spring rate is the divided by the motion ratio squared. This is described as the Installation Ratio in the reference. Motion ratio is the more common term in the industry, but sometimes is used to mean the inverse of the above definition. Motion ratio in suspension of a vehicle describes the amount of shock travel for a given amount of wheel travel. Mathematically it is the ratio of shock travel and wheel travel. The amount of force transmitted to the vehicle chassis reduces with increase in motion ratio. A motion ratio close to one is desired in vehicle for better ride and comfort. One should know the desired wheel travel of the vehicle before calculating motion ratio which depends much on the type of track the vehicle will run upon. Selecting the appropriate ratio depends on multiple factors: 1. * Bending moment: To reduce the bending moment the strut point should be close to the wheel. 2. * Suspension stiffness: Suspensions tends to stiffen when the inclination of the shock absorber to horizontal tends to 90 deg. 3. * Half-shafts: In rear suspensions, wheel travel is constrained by the universal joints of the half shafts. Design the motion ratio such that at maximum bounce and rebound shocks are the first components that bottom out by hitting bump stops. (Wikipedia).

Video thumbnail

Motion Graphs (7 of 8) Calculating Speed & Velocity for One Dimensional Motion

Shows how to calculate speed and velocity for motion in one dimension. You can see a listing of all my videos at my website, http://www.stepbystepscience.com Link for sharing this video: https://youtu.be/9cGNwPPXYGU Support my channel by doing all of the following: (1) Subscribe, get all

From playlist Motion Graphs; Position and Velocity vs. Time

Video thumbnail

Motion Graphs (6 of 8) Displacement from the Velocity vs. Time Graph

Shows how to calculate the displacement of an object from its velocity vs. time graph. You can see a listing of all my videos at my website, http://www.stepbystepscience.com The object's displacement is the area under its velocity vs time graph. Motion graphs are an excellent way to get a

From playlist Motion Graphs; Position and Velocity vs. Time

Video thumbnail

A06 The equations of motion

A mathematics bonus. In this lecture I remind you of a way to calculate the cross product of two vector using the determinant of a matrix along the first row of unit vectors.

From playlist Physics ONE

Video thumbnail

Introduction to motion

Introduction to basic physics of motion. Introduces the concept of variable velocity/acceleration.

From playlist Old Physics Videos

Video thumbnail

Acceleration, An Explanation

Describes what acceleration is in physics, how to calculate acceleration and how to determine if an object is speeding up, slowing down or moving at a constant velocity based on the direction of it velocity and acceleration vectors You can see a listing of all my videos at my website, http

From playlist Motion Graphs; Position and Velocity vs. Time

Video thumbnail

Motion Graphs (4 of 8) Velocity vs. Time Graph Part 1

Shows how to read a velocity vs. time graph including direction of motion, velocity, acceleration and how to calculate the acceleration. You can see a listing of all my videos at my website, http://www.stepbystepscience.com Motion graphs are an excellent way to get an understanding of an

From playlist Motion Graphs; Position and Velocity vs. Time

Video thumbnail

Motion Graphs (2 of 8) Position vs. Time Graph Part 2, Acceleration

Describes how to determine the slope, velocity and direction on a position vs. time graph for an object that is speed up or slowing down. You can see a listing of all my videos at my website, http://www.stepbystepscience.com Motion graphs are an excellent way to get an understanding of an

From playlist Motion Graphs; Position and Velocity vs. Time

Video thumbnail

Motion Graphs (3 of 8) Position vs. Time Graph Part 3, Constant Velocity and Acceleration

Describes how to determine the characteristics of an objects motion from its position vs time graph. You can see a listing of all my videos at my website, http://www.stepbystepscience.com Motion graphs are an excellent way to get an understanding of an objects motion over time. The slope

From playlist Motion Graphs; Position and Velocity vs. Time

Video thumbnail

Speed and Velocity in One Dimension

Describes speed and velocity and how to calculate each for one dimensional motion. You can see a listing of all my videos at my website, http://www.stepbystepscience.com

From playlist Motion Graphs; Position and Velocity vs. Time

Video thumbnail

Kepler's Three Laws of Planetary Motion

This video lesson describes Kepler's findings regarding the motion of planets about the sun. Special attention is given to the third law - the Law of Harmonies.. Numerous examples, illustrations, and animations assist in the explanations. You can find more information that supports this

From playlist Circular and Satellite Motion

Video thumbnail

How to make mathematical candy by Jean-Luc Thiffeault

ORGANIZERS: Amit Apte, Soumitro Banerjee, Pranay Goel, Partha Guha, Neelima Gupte, Govindan Rangarajan and Somdatta Sinha DATES: Monday 23 May, 2016 - Saturday 23 Jul, 2016 VENUE: Madhava Lecture Hall, ICTS, Bangalore This program is first-of-its-kind in India with a specific focus to p

From playlist Summer Research Program on Dynamics of Complex Systems

Video thumbnail

6. Driven Oscillators, Resonance

MIT 8.03SC Physics III: Vibrations and Waves, Fall 2016 View the complete course: https://ocw.mit.edu/8-03SCF16 Instructor: Boleslaw Wyslouch Driving force is introduced in the coupled system. Prof. Wyslouch solves the system and he demonstrates that one could "excite" one of the normal m

From playlist MIT 8.03SC Physics III: Vibrations and Waves, Fall 2016

Video thumbnail

Physics 3C. Lecture 04.

UCI Physics 3C: Basic Physics III (Fall 2013) Lec 04. Basic Physics III View the complete course: http://ocw.uci.edu/courses/physics_3c_basic_physics_iii.html Instructor: Michael Smy, Ph.D. License: Creative Commons CC-BY-SA Terms of Use: http://ocw.uci.edu/info More courses at http://ocw

From playlist Physics 3C: Basic Physics III

Video thumbnail

Gravitational-wave source modelling using analytical methods by Ryuichi Fujita

Discussion Meeting The Future of Gravitational-Wave Astronomy ORGANIZERS: Parameswaran Ajith, K. G. Arun, B. S. Sathyaprakash, Tarun Souradeep and G. Srinivasan DATE: 19 August 2019 to 22 August 2019 VENUE: Ramanujan Lecture Hall, ICTS Bangalore This discussion meeting, organized in c

From playlist The Future of Gravitational-wave Astronomy 2019

Video thumbnail

mod-28 lec-29 Design Analysis of ORBIT Motor - I

Fundamentals of Industrial Oil Hydraulics and Pneumatics by Prof. R.N. Maiti,Department of Mechanical Engineering,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in

From playlist IIT Kharagpur: Fundamentals of Industrial Oil Hydraulics and Pneumatics (CosmoLearning Mechanical Engineering)

Video thumbnail

Lec 16 - Phys 237: Gravitational Waves with Kip Thorne

Watch the rest of the lectures on http://www.cosmolearning.com/courses/overview-of-gravitational-wave-science-400/ Redistributed with permission. This video is taken from a 2002 Caltech on-line course on "Gravitational Waves", organized and designed by Kip S. Thorne, Mihai Bondarescu and

From playlist Caltech: Gravitational Waves with Kip Thorne - CosmoLearning.com Physics

Video thumbnail

Time Constant and the Drag Force

The time constant is defined. The equations of motion for a dropped object in terms of the time constant are derived. The graphs for those equations are also shown. Want Lecture Notes? http://www.flippingphysics.com/drag-force-time-constant.html This is an AP Physics C: Mechanics topic. P

From playlist JEE Physics Unit 3 - Laws of Motion and NEET Unit III - Laws of Motion

Video thumbnail

Episode 4: Sines And Cosines Part I - Project MATHEMATICS!

Episode 4. Sines and Cosines, Part I: (Waves) Sines and cosines occur as rectangular coordinates of a point moving on a unit circle, as graphs related to vibrating motion, and as ratios of sides of right triangles. They are related by reflection or translation of their graphs. Animation de

From playlist Courses and Series

Video thumbnail

Brian Greene World Science U Live Q+A

Watch the replay of Brian Greene's first live WSU Q+A session where he took questions on a variety of subjects including relativity, quantum, the cosmos and his WSU course, Space, Time and Einstein. To view the course visit https://worldscienceu.com/courses/space-time-and-einstein-brian-g

From playlist WSU Live Sessions

Video thumbnail

Motion Graphs (8 of 8) Distance and Displacement in One Dimension

Describes the difference between distance and displacement in one dimensional motion. Also shows how to calculate displacement. You can see a listing of all my videos at my website, http://www.stepbystepscience.com Link for sharing this video: https://youtu.be/i264R8mw1us Support my cha

From playlist Motion Graphs; Position and Velocity vs. Time

Related pages