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1. A penguin wants to slide down a hill. If the coefficient of static friction between...

1. A penguin wants to slide down a hill. If the coefficient of static friction between the penguin’s belly and the hill is μs, determine the minimum angle of the hill (θ) for which the penguin could lay down and begin sliding. 3. If a hill is inclined at 30° above horizontal, what’s the maximum coefficient of friction the penguin can have and still slide down? Determine the maximum coefficient if the hill is 45°. Do the values seem reasonable? (i.e. does it make sense which one is higher?)

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