Push-Away Problems Video Lessons

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Problem: Adam ( mA = 80 Kg) and Barbara (mB = 60 Kg) are initially together at rest on an ice rink. When they push each other part, Adam moves with velocity vA = (3  m/s)î - (9  m/s)jˆ. Assuming that there is no friction from the ice, what is Adam’s velocity? [a] (-4  m/s)î + (12  m/s)jˆ [b] (4  m/s)î - (12  m/s)jˆ [c] (-9/4  m/s)î + (24/7  m/s)jˆ [d] (3  m/s)î - (9  m/s)jˆ [e] (4  m/s)î + (12  m/s)jˆ

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Adam ( mA = 80 Kg) and Barbara (mB = 60 Kg) are initially together at rest on an ice rink. When they push each other part, Adam moves with velocity vA = (3  m/s)î - (9  m/s)jˆ. Assuming that there is no friction from the ice, what is Adam’s velocity?

[a] (-4  m/s)î + (12  m/s)jˆ

[b] (4  m/s)î - (12  m/s)jˆ

[c] (-9/4  m/s)î + (24/7  m/s)jˆ

[d] (3  m/s)î - (9  m/s)jˆ

[e] (4  m/s)î + (12  m/s)jˆ

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Based on our data, we think this problem is relevant for Professor Galeazzi's class at UM.