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Circular motion problems
Hope you can help me to solve this problem.thank you for your effort
A car is traveling at 50km/hr on a road such that the coefficient of friction between its tires and the road is 0.50.What is the maximum turning radius of the car? A 3.2 pound stone at the end of the string 2.0 feet long is whirled in a vertical circle. The tension in the string is 5.0pound when the stone is at the top of the circle.What is the velocity of the stone? |
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(a) I assume the mass of the car is m kg. The maximum value for the frictional force is given by: Now, we know that in circular motion, the centripetal force is given by: You have F, which is the centripetal force the frictional force provides, m is the mass of the car, v is the speed of the car in m/s r is the turning radius. Solve for r. (b) We know that the centripetal force here is given by the (Tension + Weight of stone). We know the mass of the stone, just convert to kg. We know the radius of the motion, just convert into metres. Solve for v the speed of the stone. Post what you get! :) |
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