A cord is used to vertically lower an initially stationary block of mass M = 8.7 kg at a constant downward acceleration of g/9. When the block has fallen a distance d = 4.9 m, find (a) the work done by the cord's force on the block, (b) the work done by the gravitational force on the block, (c) the kinetic energy of the block, and (d) the speed of the block. (Note: Take the downward direction positive) (a) Number -360 Units (b) Number 420 Units (c) Number 46 Units (d) Number i 4.20 Units m/s eTextbook and Media
A cord is used to vertically lower an initially stationary block of mass M = 8.7 kg at a constant downward acceleration of g/9. When the block has fallen a distance d = 4.9 m, find (a) the work done by the cord's force on the block, (b) the work done by the gravitational force on the block, (c) the kinetic energy of the block, and (d) the speed of the block. (Note: Take the downward direction positive) (a) Number -360 Units (b) Number 420 Units (c) Number 46 Units (d) Number i 4.20 Units m/s eTextbook and Media
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter6: Energy Of A System
Section: Chapter Questions
Problem 1CQ
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Hi, I need help with part B
2 significant digit please
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