Kinesiology 3341A/B Lecture 12: 3341 Chapter 11
13 Dec 2019
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If a ball is thrown at the ground, it bounces with less height with every bounce. It starts with an amount of potential energy and that energy is decreased overtime it hits the ground collision between ball and ground creates a loss of energy because some energy is lost as sound and heat. The softness/hardness of a ball effects its bouncing potential. Ie. hacky sacks contain rice the friction between the rice causes the energy that is brought to the relationship is deformed with the rice movement (controls the ball) The negative is related to the direction of the object. If object 2 does not move e= (-vf1)/(vi1) Use consistent units throughout (doesn"t matter what units) When a ball is just dropped (no horizontal velocity), there is no kinetic energy at the top of the drop. Larger coef cient of restitution= higher bounce height (worse ability to transfer energy to a surface)
