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Unformatted text preview: (a) What is the speed of the space station in its orbit (in km/s)? [Answer: 7.7 km/s] (b) What is the space station's orbital period (in hours)? [Answer: 1.54 hr] #2. A box whose weight is w is pulled at constant speed along a level floor by a force F that is directed at an angle above horizontal. The coefficient of kinetic friction between the floor and box is k . (a) In terms of , k , and w, calculate the required force F. (b) What values does F take for = 0 and 90? Are these the values you expect? Briefly, explain how these values make physical sense. (c) For what angle is the required force F the smallest? Please give your reasoning and computations. What is this smallest value of F? Show that this value is indeed smaller than the values of F at = 0 and 90....
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