A car travels around 200 m radius flat curve at 40 m/s at constant speed. What is the minimum static coefficient of friction which allows it to travel at this speed without sliding?
A)
1.23
B)
0.815
C)
0.736
D)
0.952
E)
0.662
B
Physics & Space Science
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A) A black hole B) A red giant C) A gray dwarf D) A yellow node
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A) 1% of the speed of light B) 0.001% of the speed of light C) 0.1% of the speed of light D) 10% of the speed of light
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Two planets travel in circular orbits about a star. The period of planet A is T, while that of planet B is 3T. What is the ratio of the orbital radii, 
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