Question and answer
A car with a mass of 2,000 kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. The curve has a radius of 80 meters. What is the centripetal force on the car?
A. 625 N B. 20,250 N C. 703 N D. 15,625 N
CF = mv^2/r= 2000*25^2/80 CF = A. 15,625 N
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User: What is the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s? A. 5,880 J B. 6,000 J C. 2,940 J D. 12,000 J

User: If the velocity of an object changes from 65 m/s to 98 m/s during a time interval of 12 s, what is the acceleration of the object? A. 5.42 m/s B. 13.58 m/s C. 33 m/s D. 2.75 m/s

User: A car with a mass of 2,000 kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. The curve has a radius of 80 meters. What is the centripetal force on the car? A. 625 N B. 20,250 N C. 703 N D. 15,625 N

Weegy: CF = mv^2/r= 2000*25^2/80 CF = A. 15,625 N
shifa saleheen|Points 9603|

User: Within the metric system all units are based on the number A. 1. B. 100. C. 10. D. 1000.

User: A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine? A. 92 percent B. 96 percent C. 94 percent D. 97 percent





Weegy: C. 94 percent
Expert answered|justpretty|Points 290|

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Asked 4/7/2012 4:57:40 PM
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