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# A 20 kg block on a horizontal surface is attached to a

## Problem 117 Chapter 8

Fundamentals of Physics | 10th Edition

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Problem 117

A 20 kg block on a horizontal surface is attached to a horizontal spring of spring constant k ! 4.0 kN/m. The block is pulled to the right so that the spring is stretched 10 cm beyond its relaxed length, and the block is then released from rest.The frictional force between the sliding block and the surface has a magnitude of 80 N. (a) What is the kinetic energy of the block when it has moved 2.0 cm from its point of release? (b) What is the kinetic energy of the block when it first slides back through the point at which the spring is relaxed? (c) What is the maximum kinetic energy attained by the block as it slides from its point of release to the point at which the spring is relaxed?

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CEM 141 Lecture 35: Temperature part 1 Dr. Jian Hu November 28 , 2016 - + + Cl > K > Na When drawing ionic compounds, denote size and ratio of cations to anions Lattice energy is influenced by the magnitude of changes and distances between ions Ionic bonding interactions are more of just a force of attraction between ions, rather than a true bond  Charge generally...

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