where 21As b decreases from the fully elastic case, b51, the reboundvelocity of the point of contact decreases until b50 forwhich no rebound occurs and there is instantaneous rollingof the ball. For b521, the ball has a perfectly smooth surfaceand there is no change in the spin or the velocity. For theintermediate case of 21,b,0, there still is slipping betweenthe ball and the surface, but energy is assumed to belost primarily to friction. The use of a coefficient of tangentialrestitution is a simplified approach to modeling the slidingcontact of the ball, which, in a more realistic model,would include Coulomb friction. In a more realistic model ofthe collision, the energy losses would depend on both thenormal and tangential velocities of the ball
การแปล กรุณารอสักครู่..