1) A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the
ID: 1961154 • Letter: 1
Question
1) A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the track is a turn with radius approximately 187 ft. If we approximate the track to be completely flat and the racecar is traveling at a constant 66.0 mph around the turn, what is the racecar's centripetal (radial) acceleration?
= __________ ft/s2
What is the force responsible for the centripetal acceleration in this case?
To keep from skidding into the wall on the outside of the turn what is the minimum coefficient of static friction between the racecar's tires and track?
= ______________
1) A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the track is a turn with radius approximately 187 ft. If we approximate the track to be completely flat and the racecar is traveling at a constant 66.0 mph around the turn, what is the racecar's centripetal (radial) acceleration? = __________ ft/s^2 What is the force responsible for the centripetal acceleration in this case? To keep from skidding into the wall on the outside of the turn what is the minimum coefficient of static friction between the racecar's tires and track? = ______________Explanation / Answer
given that radius of track r = 187ft = 187 * 0.3048m = 56.99m speed of car v = 66 mph = 66 * 1.467 ft/s = 96.822 ft/s (or) v = 66 * 0.4470 m/s = 29.50 m/s centripetal acceleration a = v2/r = 50.13 ft/s2 ----------------------------------------------------------------------
the speed , v = rs g v2/ rg = s = 1.5 the minimum coefficient of static friction between the racecar's tires and track is 1.5. the speed , v = rs g v2/ rg = s = 1.5 = 1.5
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