EXSS1018 Lecture Notes - Lecture 11: Angular Acceleration, Angular Velocity, Net Force

• School: University of Sydney
• Department: Exercise and Sport Science
• Course: EXSS1018
• Professor: Dr Edouard Rene Ferdinands

Document Summary

Causes linear motion/acceleration force of application through centre of mass of the object (middle) Produces turning effect (when force of application not through the centre of mass in axis of rotation) Moment arm (d) = perpendicular distance away from axis of rotation. Changes the state of motion of an object by applying a torque. Distance measured perpendicular to the line of force. Passes through the point about which torques are calculated (axis of rotation) Extend the line of force to find the point of application of the axis of rotation. Mechanical advantage = distance moved by effort force/distance moved by resistance force. Greater resistance + more effective turning force produced by longer effort arm than length of resistance. Acceleration is zero (no unbalanced external forces. Sum of all external torques = zero. Forces are balanced = net force equals zero. Torques are balanced net torque equals zero. Acceleration about centre of motion = zero.