HU_Recitation # 8_Solution Sheet

# HU_Recitation # 8_Solution Sheet - HOWARD UNIVERSITY PHYS...

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HOWARD UNIVERSITY PHYS 001-RECITATON ASSIGNMENT # 8 One of the most powerful laws in physics is the law of momentum conservation. The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2. The above statement tells us that the total momentum of a collection of objects (a system ) is conserved - that is, the total amount of momentum is a constant or unchanging value. Part I. Momentum Conservation Principle Express your understanding of the concept and mathematics of momentum by answering the following questions. 1) If a 5-kg bowling ball is projected upward with a velocity of 2.0 m/s, then what is the recoil velocity of the Earth (mass = 6.0 x 10 24 kg). Answer: Since the ball has an upward momentum of 10 kg*m/s , the Earth must have a downward momentum of 10 kg*m/s. To find the velocity of the Earth, use the momentum equation, p = m*v. This equation rearranges to v=p/m. By substituting into

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## HU_Recitation # 8_Solution Sheet - HOWARD UNIVERSITY PHYS...

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