Problem 4: A firecracker is thrown into the air. At the peak of its path (where its velocify is zero) it explodes into three pieces. Pieces one and two have mass m=20g. Piece three has mass m-60g. Piece one is measured to be going 50m/s in the negative x-direction and piece two is measured to be going 50m/s at an angle of 30 degrees above the positive x-axis. A. What is the initial total momentum of the system, ie., what was the momentum of the firecracker before it exploded? Answer: 0kg m/s B. What is the magnitude of the momentum of the piece going in the negative x-direction? Answer: 1kg m's C. What is the magnitude of the momentum of the piece going 30 degrees above the positive x- axis? Answer: Ikg m/s D. What are the x- and y- components of the piece going 30 degrees above the x-axis? E. Using your knowledge of conservation of momentum, what must the x- and ycomponents of the momentum, P3, of the third piece be? F. Finally, using the components you calculated in part E̟ what is the magnitude and direction of the momentum of the third piece? What is its velocity?

Problem 4: A firecracker is thrown into the air. At the peak of its path (where its velocify is zero) it explodes into three pieces. Pieces one and two have mass m=20g. Piece three has mass m-60g. Piece one is measured to be going 50m/s in the negative x-direction and piece two is measured to be going 50m/s at an angle of 30 degrees above the positive x-axis. A. What is the initial total momentum of the system, ie., what was the momentum of the firecracker before it exploded? Answer: 0kg m/s B. What is the magnitude of the momentum of the piece going in the negative x-direction? Answer: 1kg m's C. What is the magnitude of the momentum of the piece going 30 degrees above the positive x- axis? Answer: Ikg m/s D. What are the x- and y- components of the piece going 30 degrees above the x-axis? E. Using your knowledge of conservation of momentum, what must the x- and ycomponents of the momentum, P3, of the third piece be? F. Finally, using the components you calculated in part E̟ what is the magnitude and direction of the momentum of the third piece? What is its velocity?

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University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 33P: A hockey puck of mass 150 g is sliding due east on a frictionless table with a speed of 10 m/s....

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