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Q1. A 270 m wide river flows due east at a uniform speed of 2.30 m/s. A boat with the speed of 8.4 m/s relative to water leaves the south bank pointed in a direction 38o west of north. What is (a) magnitude and (b) direction of the boat's velocity relative to the ground? Give direction as angle of the velocity from due north, positive if to east and negative if to the west.

Q2. A curve with a 150 radius on a level road is banked at the correct angle for a speed of 20. If an automobile rounds this curve at 70, what is minimum coefficient of static friction between tires and road necessary to prevent skidding?

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