Answered: A block is at rest on a horizontal…

Name: A block is at rest on a horizontal frictional surface. A string is att
Uploaded: 2024-03-20T06:57:25.000Z
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Description: A block is at rest on a horizontal frictional surface. A string is attached to the block, and is pulled with a force of 65.4 N at an angle theta above the horizontal. After the block is pulled through a distance of 1.35 m, its speed is 1.69 m/s, and

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 7PE: A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N...

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A block is at rest on a horizontal frictional surface. A string is attached to the block, and is pulled with a force of 65.4 N at an angle theta above the horizontal. After the block is pulled through a distance of 1.35 m, its speed is 1.69 m/s, and 85.0 J of work has been done on it.

Part A: Find the mass of the block.

Part B: What is the work done by normal force in this case? Explain.

Part C: Let’s say you are lifting this block in air instead of pulling it on the ground and then let go of it. How high will you have to lift this block to reach this same speed of 1.69 m/s moments before it touches the ground?

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