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Unformatted text preview: volved in the explosion are internal to the snowball. 5. Two objects of equal mass are on a frictionless track. (a) The velocity of the center of mass is equal to v 2 . (b) The velocity of the center of mass is less than v 2 . Consider the limiting case of a ping-pong ball Fying towards a bowling ball; obviously in this case, the center of mass velocity is going to be very small. Problems 1. inding the center of mass: (a) Taking the center of the total square to be (0 , 0): x cm =-. 05 m and y cm =-. 14 m (b) Taking the center to be the center of the central square: x cm = 0 and y cm =-. 36 cm . 1 2. The center of mass is vx cm = + r 3 R 2-r 2 y 3. A man kicks a rock: V man =-m M V rock = . 07 m/s 4. A hockey puck explodes: V f =-V x + 4 V y 5. Two cars collide: vV c = (15 . 3 kph ) x + (5 kph ) y . In other words: V c = 16 kph and c = 18 . 2 o . 2...
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