Question

63. Two billiard balls of identical mass move toward each other. Assume that the collision between them is perfectly elastic. If the initial velocities of the balls are 30 cm/s and -20 cm/s, assume friction and rotation are unimportant What are the velocities of the balls after the collision? Find the final velocity of the two balls if the ball initial velocity of -20 cm/s has a mass equal to one half of the ball with initial velocity 30 cm/s

Answer 1

Answer! (63) Elastic head on collision: Final velaities are v = ( 2 ) e, - (m. m2 uz ard Mitma) Vi mi-M2 12 m2 mitme mitm2 Given me = M2=m, initial velocities Up= 30ml, "=-20m/s. the They N V, 3 m 2m tm mam) Than vi (2017) + (2m(-20mb) ::VO: 0-20 m) = (-20 ms) and you in combo) – ceny na C-om b) = (Bomber - 0 - 2 -2on M

Th F 3)) - (0) 40ml + 6.67 mb - (46.67 ml and you 1933 (sob) ( 276-2012 Lmit(mil Imt mij (zomb) + { (-2014) 1-3:33 s - Hence, V = -3.33m/ and y=46.64 mis