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physics 203

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The figure shows a 1.50kg block at rest on a ramp of height, h. When the block is released, it reaches the bottom of the ramp and moves across a surface that is frictionless except for one section of width 10cm that has a coefficient of kinetic friction uk=0.64. Find h such that the block's speed after crossing the rough patch is 3.50m/s (Remember that the force of friction is fk=(uk)(N), where N is the normal).

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