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PracticeExam1-2012spring-complete

# PracticeExam1-2012spring-complete - PHYS...

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Problems 1-3 use the same graph Problem 1 What are the components of the vector a x1 ? A) <6, 8> m B) <5, 2> m C) <-3, 5> m D) <8, 6> m E) <-4, 2> m Problem 2 What is the unit vector in the direction of the vector a x1 ? Problem 3 Which one of the following statements is true about vectors a x1 , b x1 and c x1 ?
Problem 4 A cannon ball is shot into air and flies along parabolic trajectory as shown in the picture below. Ignore air friction (drag) and account only for interactions between cannon, ball and the Earth (ignore other celestial bodies). For the time interval when cannon ball flies from point A to B, examine the following statements: 1. The momentum of the cannon ball is conserved 2. The total momentum of the cannon and the ball is conserved 3. The total momentum of Earth, cannon and cannon ball is conserved 4. The total velocity of Earth and cannon is conserved 5. The velocity of the cannon ball is conserved Which statements are correct?

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PracticeExam1-2012spring-complete - PHYS...

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