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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker
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In the previous problem, (a) does the kinetic energy of

Chapter 11, Problem 70P

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QUESTION:

Problem 70P

In the previous problem, (a) does the kinetic energy of the system increase, decrease, or stay the same when the person jumps on the merry-go-round? (b) Calculate the initial and final kinetic energies for this system.

Reference Problem:

        .    •• A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.641 rev/s. A 59.4-kg person running tangential to the rim of the merry-go-round at 3.41 m/s jumps onto its rim and holds on. Before jumping on the merry-go-round, the person was moving in the same direction as the merry-go-round's rim. What is the final angular speed of the merry-go-round?

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QUESTION:

Problem 70P

In the previous problem, (a) does the kinetic energy of the system increase, decrease, or stay the same when the person jumps on the merry-go-round? (b) Calculate the initial and final kinetic energies for this system.

Reference Problem:

        .    •• A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.641 rev/s. A 59.4-kg person running tangential to the rim of the merry-go-round at 3.41 m/s jumps onto its rim and holds on. Before jumping on the merry-go-round, the person was moving in the same direction as the merry-go-round's rim. What is the final angular speed of the merry-go-round?

ANSWER:

Step 1 of 5

In part(a) we need to find the kinetic energy of the system will increase, decrease, or remains the same, when the person jumps on the merry-go-round. And, in part(b) to find the initial and final kinetic energy of the system.

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