C4_presentation

C4_presentation - Suppose a system of particles experiences...

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Suppose a system of particles experiences no external interactions. What else must be true? (A) It also experiences no internal interactions. (B) Its total momentum is not conserved. (C) Its center of mass is stationary. (D) The system’s total momentum is constant. (E) None of the above.
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Total momentum defined: N tot p p p p + + + = ... 2 1 The Law of Conservation of Momentum: The total momentum of an isolated system does not change with time.
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x (east) y (north) v = 5.0 m/s v = 2.0 m/s Two 3.0-kg blocks are sliding along an icy surface with velocities as shown in the diagram at left . What is the total momentum of the two blocks? = 0 0 m/s kg 0 . 15 1 p = 0 m/s kg 6.0 - 0 2 p = + = 0 m/s kg 6.0 - m/s kg 0 . 15 2 1 p p p tot
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collisions between two identical balls floating in space. The white ball was initially moving to the right along the dotted line before it hit the gray ball, which was initially at rest. (The collision is not necessarily head-on.) The arrows depict the balls’ final velocities. Which outcomes are physically possible? For each case, write T if it is, F if not.
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C4_presentation - Suppose a system of particles experiences...

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