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A puck of mass Ma that is moving along the +x axis with speed va collides with another puck of mass mg = 3ma. The collision is not head-on, so that after they collide, mB is located at 45° south of east, while ma collides head-on elastically with a stationary puck of mass mc = 2ma. If, after the second collision, the final velocity of mc is 0.750 [m/s], 25° north of east, what is the initial speed va? A. 0.450 [m/s] B. 2.25 [m/s] C. 1.49 [m/s] D. 1.12 [m/s]

A puck of mass Ma that is moving along the +x axis with speed va collides with another puck of mass mg = 3ma. The collision is not head-on, so that after they collide, mB is located at 45° south of east, while ma collides head-on elastically with a stationary puck of mass mc = 2ma. If, after the second collision, the final velocity of mc is 0.750 [m/s], 25° north of east, what is the initial speed va? A. 0.450 [m/s] B. 2.25 [m/s] C. 1.49 [m/s] D. 1.12 [m/s]

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A puck of mass mA that is moving along the +x axis with speed va collides with another puck of mass mB = 3mA. The collision is not head-on, so that after they collide, m­B is located at 45◦ south of east, while mA collides head-on elastically with a stationary puck of mass mC = 2mA. If, after the second collision, the final velocity of mC is 0.750 [m/s], 25◦ north of east, what is the initial speed va?

  1. 0.450 [m/s]
  2. 2.25 [m/s]
  3. 1.49 [m/s]
  4. 1.12 [m/s]
y y mc mc mA –-x --x B = 45.0° MA MBi mB AFTER BEFORE
Transcribed Image Text:y y mc mc mA –-x --x B = 45.0° MA MBi mB AFTER BEFORE
A puck of mass ma that is moving along the +x axis with speed v, collides with another puck of mass mB = 3ma. The collision is not head-on, so that after they collide, mB is located at 45º south of east, while ma collides head-on elastically with a stationary puck of mass mc = 2ma. If, after the second collision, the final velocity of mc is 0.750 [m/s], 25° north of east, what is the initial speed va? A. 0.450 [m/s] B. 2.25 [m/s] C. 1.49 [m/s] D. 1.12 [m/s]
Transcribed Image Text:A puck of mass ma that is moving along the +x axis with speed v, collides with another puck of mass mB = 3ma. The collision is not head-on, so that after they collide, mB is located at 45º south of east, while ma collides head-on elastically with a stationary puck of mass mc = 2ma. If, after the second collision, the final velocity of mc is 0.750 [m/s], 25° north of east, what is the initial speed va? A. 0.450 [m/s] B. 2.25 [m/s] C. 1.49 [m/s] D. 1.12 [m/s]
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