A 20 g plastic ball is moving to the left at 30 m/s. How

Chapter 11, Problem 9E

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QUESTION:

Problem 9E

A 20 g plastic ball is moving to the left at 30 m/s. How much work must be done on the ball to cause it to move to the right at 30 m/s?

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QUESTION:

Problem 9E

A 20 g plastic ball is moving to the left at 30 m/s. How much work must be done on the ball to cause it to move to the right at 30 m/s?

ANSWER:

Step 1 of 2

 

Here we need to calculate the amount of work that has to be done on a ball of mass moving to the left at velocity to make it move to the right at  . For convenience, towards left is taken to be negative and towards right is taken to be positive.

 

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