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What force does a trampoline have to apply to a 45.0-kg

Chapter 4, Problem 18

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QUESTION:

Problem 18PE

What force does a trampoline have to apply to a 45.0-kg gymnast to accelerate her straight up at 7.50 m/s2 ? Note that the answer is independent of the velocity of the gymnast—she can be moving either up or down, or be stationary.

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QUESTION:

Problem 18PE

What force does a trampoline have to apply to a 45.0-kg gymnast to accelerate her straight up at 7.50 m/s2 ? Note that the answer is independent of the velocity of the gymnast—she can be moving either up or down, or be stationary.

ANSWER:

Solution 18PE

We are required to calculate the force on the gymnast that a trampoline would apply to her if she has an upward acceleration.

Step 1 of 2

The acceleration due to gravity  m/s2

The upward acceleration of the gymnast 7.50 m/s2

Therefore, the net acceleration of the gymnast  m/s2

                                                                            m/s2

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