Your friend places a cup of coffee on the roof of her car while andaccidently dr
ID: 1764720 • Letter: Y
Question
Your friend places a cup of coffee on the roof of her car while andaccidently drives off with the coffee cup still on the roof. (a) If the coefficient of static frictionbetween the coffee cup and the roof of the car is 0.23, what is the maximum acceleration the car canhave without causing the cup to slide? Ignore the effects of airresistance. (b) What is the smallest amount of time in which the person canaccelerate the car from rest to 10 m/s andstill keep the coffee cup on the roof?(a) If the coefficient of static frictionbetween the coffee cup and the roof of the car is 0.23, what is the maximum acceleration the car canhave without causing the cup to slide? Ignore the effects of airresistance.
Explanation / Answer
= 0.23, v = 10 m/s a) mg = ma a = g = 2.25 m/s2 b) t = v/a = 4.44 s
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