In Figure, both balls have the same mass. The ball on the left is displaced to the outlined position and released; it collides with the stationary ball and sticks to it. How fast are the balls moving just after collision? (a) 2gh (b) 2gh (c) gh (d) 3gh (e) 2gh What fraction of its kinetic energy did the first ball lose in the collision? (a) %100 (b) %75 (c) %25 (d) %40 (e) %50 fo J Suppose the two balls in figure have different masses; the ball on the left has m. When it is let go from the height shown, it hits the second ball and sticks to it. The combination then swings to a height h/9. Find the mass m2 of second ball in terms of mi (a) m=2m (b) m2=4m1 (c) m2=3m1 (d) m2=(1/2)m (e) m2=(3/2)m1 In figure, these two balls having different masses are displaced to a height h, one to the left and the other to the right. They are released simultaneously and undergo a perfectly elastic collision (it is assumed) at the bottom. How high does each swing after the collision? (a) V = 22gh, V2f = 2gh (b) Vf = -(5/3)2gh, Vf = (1/3)//2gh (c) Vf = (4/3)2gh, V2f = 2gh (d) V = 2gh, V2f = 2gh (e) V = -(2/3)2gh, V2f = 2gh Using the result of (23), the mass on the left (m) in figure is pulled aside and released. Its velocity at the bottom is vo just as it collides with the ball on the right (m) in a perfectly elastic collision. Find the velocities of two balls just after collision. (a) V = (1/3)vo, V2f = (2/3)vo (b) Vf-vo, V2f =Vo (c) Vf-2vo, V2f = (1/3) vo (d) V = (1/2)vo, V2f = (1/3)vo (e) Vif = -(1/3)vo, V2f = (1/3) vo