Physics-
General
Easy
Question
The minimum velocity (in
) with which a car driver must traverse a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding is
- 30
- 15
- 25
The correct answer is: 30![blank m s to the power of negative 1 end exponent](data:image/png;base64,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)
Using the relation
![fraction numerator m v to the power of 2 end exponent over denominator r end fraction equals mu R comma R equals m g](data:image/png;base64,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)
or ![v to the power of 2 end exponent equals mu r g](data:image/png;base64,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)
or ![v to the power of 2 end exponent equals 0.6 cross times 150 cross times 10](data:image/png;base64,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)
or ![v equals 30 blank m s to the power of negative 1 end exponent](data:image/png;base64,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)
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