Answer any four. Show detailed steps 1. A billiard ball moving with speed 3.0 m/s in the +x direction strikes an equal-mass ball initialy at rest The two balls are observed to move at 45°, ball 1 above the x-axis and ball 2 below What are the speeds of the two balls after the collision? th a veiority of 3.62 mis on a frictionless, level air Solution will divide the problem into two motions; motion along x and motion along y along x using conservation of linear momentum m(3)+ m(0) = m(v1 * cos45)+m(v2 * cos45) giving, v1 + v2 = 3*sqrt(2)____________(1) along y using conservation of linear momentum 0 = m(v1 * sin45)-m(v2 * sin45) giving, v1 = v2______________________(2) using 1 and 2 v1=v2= 3/sqrt(2) .