Kinesiology 2241A/B Midterm: Midterm 2 - Lecture 10

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

Document Summary

Lift can either be created with airfoils or with spherical objects. To get a lift force with a non-airfoil (ex: discuss), you must attain an angle of attack. Lift drag ratio: increasing lift also increases drag. Sidespin is described based on the spin of he back of the ball. When a ball has backspin and it hits the floor it will bounce up at a higher projection angle than the one that it hits the floor at. The bottom of the ball is moving toward the flight direction. The ball rubs the floor in a horizontal direction that decelerates the ball"s forward motion. Result: decreased horizontal motion, and the same vertical motion. As a result, the rebound angle is higher than the drop angle. The top of the ball is moving toward the flight direction. The ball spin rubs the floor in a horizontal direction that accelerates the ball"s forward direction. Result: increased horizontal motion, and the same vertical motion.