1.

Agolf ball bounces down a ight of steel stairs, striking several steps on the way down, but never hitting the edge of a step. The ball starts at the top step with a vertical velocity component of zero. If all the collisions with the stairs are elastic. and if the vertical height of the staircase is 4.85 m, determine the bounce height when the ball reaches the bottom of the stairs. Neglect air resistance. For the situation in the figure below, use momentum conservation to determine (a) the magnitude and (b) the direction of the final velocity of ball 1 after the collision. The angle $ = 46.0. up1 = 0.900 m/'s ty m1 = 0.150 kg . +x up2 = 0.540 m/s 35.0 my = 0.260 kg #2 = 0.700 m/s (a) ty Ufly - +x (b) (a) Top view of two balls colliding on a horizontal surface. (b) This part of the drawing shows the x and y components of the velocity of ball 1 after the collision