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The 100−lb block is stationary at time t = 0, and then it is subjected to the force P shown. Note that the force is zero for all times beyond t = 20 sec. If μs = 0.6, μk = 0.4, and θ = 25∘, determine the velocity v of the block at time t = 25 sec. Also, calculate the time t at which the block comes to rest again. (v = 89.4 ft/sec, the block never stops)

The 100−lb block is stationary at time t = 0, and then it is subjected to the force P shown. Note that the force is zero for all times beyond t = 20 sec. If μs = 0.6, μk = 0.4, and θ = 25∘, determine the velocity v of the block at time t = 25 sec. Also, calculate the time t at which the block comes to rest again. (v = 89.4 ft/sec, the block never stops)

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The 100 − lb block is stationary at time t = 0 , and then it is subjected to the force P shown. Note that the force is zero for all times beyond t = 20 sec . If μ s = 0.6 , μ k = 0.4 , and θ = 25 ∘ , determine the velocity v of the block at time t = 25 sec . Also, calculate the time t at which the block comes to rest again. ( v = 89.4 ft / sec , the block never stops)

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