17. In the arrangement of the figure, billiardball 1 moving at a speed of 1.95 m/sundergoes a glancing collision withidentical billiard ball 2 that is at rest.After the collision, ball 2 moves at speed1.01 m/s, at an angle of 02 = 58.7°. Whatare (a) the magnitude and (b) thedirection (angle 01) of the velocity of ball1 after the collision?18. A 3.5 kg object moving at 5.1 m/s in thepositive direction of an x axis has aone-dimensional elastic collision with anobject of mass M, initially at rest. Afterthe collision the object of mass M has avelocity of 5.0 m/s in the positivedirection of the x axis. What is mass M?

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