Torque defined
Download
1 / 13

TORQUE DEFINED - PowerPoint PPT Presentation


  • 107 Views
  • Updated On :

TORQUE DEFINED. a Force applied a system restricted to moving in a circular path causes a system/body to rotate the Point of Application is eccentric T = F x FA . MUSCLE TORQUES. Magnitude - product of F x FA Direction - angle of pull on bone Line of Action - vector direction

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'TORQUE DEFINED' - nuwa


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Torque defined
TORQUE DEFINED

  • a Force applied a system restricted to moving in a circular path

  • causes a system/body to rotate

  • the Point of Application is eccentric

  • T = F x FA


Muscle torques
MUSCLE TORQUES

  • Magnitude - product of F x FA

  • Direction - angle of pull on bone

  • Line of Action - vector direction

  • Point of Application - attachment to bone


Fa force arm
FA: FORCE ARM

  • shortest distance from axis of rotation to the line of action of the applied Force

  • (perpendicular) to line of action


Teeter totter
TEETER-TOTTER

  • Axis of Rotation

  • 2 Forces

  • 2 Force Arms



See

FIG 9-30 page 296

“Basic Biomechanics”

4th Edition

Susan J. Hall


  • T = F x FA

  • F is board reaction

  • FA is d 

  • t is board recoil time

p. 328 in course text


Calculating torque
CALCULATING TORQUE

  • Force measured in Newtons [4.45N = 1Lb.]

  • Force Arm measured in meters

  • Torque measured in Newton meters [Nm]


  • FIG E.11 page 118

  • sum up all Torques on each side of axis

  • side of axis with the larger  of T determines direction of movement


Angular motion vectors
Angular Motion Vectors

  • there are both kinetic and kinematic vectors

  • A vector is represented by a straight line arrow symbol

  • the length of the arrow is the magnitude

  • the orientation of the arrow is the direction

  • to get a straight line vector for angular motion, the right hand thumb rule is used


Right hand thumb rule
RIGHT-HAND THUMB RULE

  • method of determining vector direction for angular motion

  • curve fingers of right hand in the direction of the Torque

  • right thumb points in vector direction of the motion, to the actual direction of the spin


Right-Hand Thumb points in vector direction

FIG 15.9on page 506

FIG 15.10on page 507


Center of buoyancy
CENTER of BUOYANCY

See course text

FIG E.21 on page 127

FIG E.22 on page 127

  • C of B is the location of the C of G of the volume of water displaced by a immersed body

  • There is no T (torque) when the person’s CB is aligned with her/his CG

  • When CB is co-linear with CG, the body will float and not rotate


ad