These are two practice test questions from a 50 questionpractice test. Both a re

Question

These are two practice test questions from a 50 questionpractice test. Both a re uniform circular motion problems. detailedanswer gets lifesaver rating. 1. A .2 kg stone is attached to a string and swung in circularmotion with radius of .6 meters on a horizontal and frictionlesssurface. If stone makes 150 rev per minute what is the tension onthe string attached to the stone? 2. An automobile moves on a level horizontal surface in acircle radius 30 meters. The coeeff of firction between tires androad is .50. What is the maximum speed with which the car can roundthe curve? These are two practice test questions from a 50 questionpractice test. Both a re uniform circular motion problems. detailedanswer gets lifesaver rating. 1. A .2 kg stone is attached to a string and swung in circularmotion with radius of .6 meters on a horizontal and frictionlesssurface. If stone makes 150 rev per minute what is the tension onthe string attached to the stone? 2. An automobile moves on a level horizontal surface in acircle radius 30 meters. The coeeff of firction between tires androad is .50. What is the maximum speed with which the car can roundthe curve?

Explanation / Answer

1. A .2 kg stone is attached to a string and swung in circularmotion with radius of .6 meters on a horizontal and frictionlesssurface. If stone makes 150 rev per minute what is the tension onthe string attached to the stone?

tension=m r w*w = 2*0.6*(2*3.14*150/60)2=295.788N


2. An automobile moves on a level horizontal surface in acircle radius 30 meters. The coeeff of firction between tires androad is .50. What is the maximum speed with which the car can roundthe curve?

maximum speed=rg=0.5*30*9.8=12.124355653m/sec

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