[" 17.A body "X" with a momentum p collides with another "],[" in.A body "X" with a mody "Y" one dimedinensionally,During the "],[" idchical stationary body "Y" one dimensionally.Then cocficient "],[" collistivion Y gives an impulse Jto body "x" .Then cocticient "],[" collistivution is "],[[" (a) "(2y)/(p)-1," (b) "(j)/(p)+1]],[[" (a) "(2darr)/(p)-1," (b) ",=-1]]