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Q. At one instant a bicyclist is 25 m due east of a park's flagpole, going due south with a speed of 8 m/s. Then, 11 s later, the cyclist is 65 m due north of the flagpole, going due east with a speed of 10 m/s.

Q. A rocket, weighing 4.36 x 10^4 N, has an engine that provides an upward force of 8.90 x 10^5 N. It reaches a maximum speed of 860 m/s. What is the net force?

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