Kinesiology 2241A/B Lecture 5: Lec. 5 Linear Kinematics

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Daniel Bechard

Document Summary

Kinematics is the branch of classical mechanics which describes the motion of points, bodies (objects) and systems of bodies (groups of objects) without consideration of the causes motion . Scalar (position/distance) vs. vector quantities (has to be direction of motion) Average speed = distance/ time: both scalar quantities . Average velocity = displacement / time: displacement has direction . Average acceleration = velocity / time. Differentiation: use slope of the curve. Displacement starting at 0, velocity close to 0, acceleration starts when we start running. Moving forward, displacement increasing (natural curve), velocity at 1. 5 sec- max velocity, acceleration decreases. At max velocity, its half of displacement. When hit top displacement, velocity is 0, decelerating: use area under the curve. Average- looking at entire motion from start to end (complete average) Take off- when you apply force to leave the ground, point has its own instantaneous velocity.