Answered: 1. A work of 12 J is needed to stretch…

Name: 1. A work of 12 J is needed to stretch a certain spring by 30 cm a) Wh
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Description: 1. A work of 12 J is needed to stretch a certain spring by 30 cm a) What is the force constant of the spring? b) How much work must be done to stretch the spring 4.00 cm? c) When released from rest from 4.00 cm position what would be the speed at the

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 27AP: Consider the blockspringsurface system in part (B) of Example 8.6. (a) Using an energy approach,...

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1. A work of 12 J is needed to stretch a certain spring by 30 cm a) What is the force constant of the spring? b) How much work must be done to stretch the spring 4.00 cm? c) When released from rest from 4.00 cm position what would be the speed at the unstretched position?

2. An electric motor with an output of 15kW provides power for the elevator of a six-storey building. If the total mass of the load and elevator is 1000kg, what is the minimum time needed for it to rise 30m from the ground floor to the top floor?

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