Maximum allowed frictional coefficient
At the end of a factory production line, boxes start from rest and slide down a 30° ramp 5.6m long. If the slide is to take no more than 4.3s , what's the maximum allowed frictional coefficient?
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The drawbridge then starts to rise. The dancer continues to stand on one leg. The drawbridge stops just at the point where the dancer is on the verge of slipping. What is the magnitude f of the frictional force now?
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