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# example 2-1 - Example 2-1 A block of mass 8.2 lbm slides...

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Example 2-1 A block of mass 8.2 lbm slides along a horizontal floor. The coefficient of friction between the block and the floor is 0.3 and the initial velocity of the block is 12 ft/s. Use the first law to determine the distance the block will slide before it stops. Solution: Choose the block to be the closed system under study. From the first law KE PE U Q W ∆+ ∆=− The elevation of the block is unchanged. We assume the temperature (and thus internal energy) of the block is unchanged, and there is no heat transfer. The first law

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example 2-1 - Example 2-1 A block of mass 8.2 lbm slides...

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