Rl-11. A 20-kg block is originally at rest on a horizontal

Chapter 16, Problem R1-11

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A 20-kg block is originally at rest on a horizontal surface for which the coefficient of static friction is \(\mu_{s}=0.6\) and the coefficient of kinetic friction is \(\mu_{k}=0.5\). If a horizontal force F is applied such that it varies with time as shown, determine the speed of the block in 10 s. Hint: First determine the time needed to overcome friction and start the block moving.

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