A 30.0-kg block is resting on a flat horizontal table. On top of this block is resting a 15.0-kg block, to which a horizontal spring is attached, as the figure illustrates. The spring constant of the spring is 239 N/m. The coefficient of kinetic friction between the lower block and the table is 0.649, and the coefficient of static friction between the two blocks is 0.903. A horizontal force is applied to the lower block as shown. This force is increasing in such a way as to keep the blocks moving at a constant speed. At the point where the upper block begins to slip on the lower block, determine (a) the amount by which the spring is compressed and (b) the magnitude of the force. (a) Number i (b) Number i www 30.0 kg Units 15.0 kg Units F ✪ û
A 30.0-kg block is resting on a flat horizontal table. On top of this block is resting a 15.0-kg block, to which a horizontal spring is attached, as the figure illustrates. The spring constant of the spring is 239 N/m. The coefficient of kinetic friction between the lower block and the table is 0.649, and the coefficient of static friction between the two blocks is 0.903. A horizontal force is applied to the lower block as shown. This force is increasing in such a way as to keep the blocks moving at a constant speed. At the point where the upper block begins to slip on the lower block, determine (a) the amount by which the spring is compressed and (b) the magnitude of the force. (a) Number i (b) Number i www 30.0 kg Units 15.0 kg Units F ✪ û
Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter8: Conservation Of Energy
Section: Chapter Questions
Problem 8.69AP: A block of mass M rests on a table. It is fastened to the lower end of a light, vertical spring. The...
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