The Coefficient of Static Friction for the Tires of a Race

question 6

Multiple Choice

The coefficient of static friction for the tires of a race car is 0.950 and the coefficient of kinetic friction is 0.800.The car is on a level circular track of 50.0 m radius on a planet where $$g = 2.45 \frac { \mathrm { m } } { \mathrm { s } ^ { 2 } }$$ compared to Earth's $g = 9.80 \frac { \mathrm { m } } { \mathrm { s } ^ { 2 } }$ .If the car is to be able to travel at the same speed on the planet as on Earth,the radius of the track on the planet must be ____ times as large as the radius of the track on Earth.

• A)0.250
• B)0.500
• C)1.00
• D)2.00
• E)4.00

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