Question: 7. DETAILS MY NOTES ' ASK YOUR TEACHER A bin is given a push across a horizontal surface. The bin has a mass m, the

7. DETAILS MY NOTES ' ASK YOUR TEACHER A bin is given a push across a horizontal surface. The bin has a mass m, the push gives it an initial speed of 3.40 mfs, and the coefficient of kinetic friction between the bin and the surface is 0.140. (3) Use energy considerations to nd the distance (in m) the bin moves before it stops. [:Jm (b) What If? Determine the stopping distance (in m) for the bin if its initial speed is doubled to 6.80 m/s. :J'\" 8. DETAILS MY NOTES ' ASK YOUR TEACHER A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 36.0 above the horizontal. The car accelerates uniformly to a speed of 2.35 mils in 13.5 s and then continues at constant speed. (a) What power must the winch motor provide when the car is moving at constant speed? kw D (b) What maximum power must the motor provide? kw U (c) What total energy transfers out of the motor by work by the time the car moves off the end of the track, which is of length 1,250 m? J U

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