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4 Aug 2018
5.38 - A box with mass m is dragged across a level floor with coefficient of kinetic friction uk by a rope that is pulled upward at an angle above the horizontal with a force of magnitude E. (a) In terms of m, Mk 6, and g, obtain an expression for the magni- tude of the force required to move the box with constant speed. (b) Knowing that you are studying physics, a CPR instructor asks you how much force it would take to slide a 90-kg patient across a floor at constant speed by pulling on him at an angle of 25° above the horizontal. By dragging weights wrapped in an old pair of pants down the hall with a spring balance, you find that Mr = 0.35. Use the result of part (a) to answer the instructor's question.
5.38 - A box with mass m is dragged across a level floor with coefficient of kinetic friction uk by a rope that is pulled upward at an angle above the horizontal with a force of magnitude E. (a) In terms of m, Mk 6, and g, obtain an expression for the magni- tude of the force required to move the box with constant speed. (b) Knowing that you are studying physics, a CPR instructor asks you how much force it would take to slide a 90-kg patient across a floor at constant speed by pulling on him at an angle of 25° above the horizontal. By dragging weights wrapped in an old pair of pants down the hall with a spring balance, you find that Mr = 0.35. Use the result of part (a) to answer the instructor's question.
Nestor RutherfordLv2
5 Aug 2018
