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Texas Motor Speedway On October 28, 2000 Gil de Ferran set the single-lap average speed record for the then-named California Speedway—241.428 mi /h. The following year, on April 29, 2001, the Championship Auto Racing Teams (CART) organization canceled the inaugural Firestone Firehawk 600 race at the Texas Motor Speedway 2 hours before it was to start. During practice, drivers became dizzy when they reached speeds of more than 230 mph on the high-banked track The Texas Motor Speedway has turns banked at
In qualifying runs for the race, 21 of 25 drivers complained of dizziness and disorientation They experienced accelerations of 5.5g (5.5 times
If the racecars had no help from friction, which expression below would describe the normal force of the track on the cars while traversing the
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- A race car with a mass of 750kg is traveling at a constant speed of 75m/s around a circular track of an radius of 50m. A-what is the direction and the magnitude of the centripetal acceleration of the racecar? B- what happens to the centripetal force of the car if the speed is doubled?arrow_forwardA car with a constant speed of 95 km/h enters a circular flat curve with a radius of 0.5 km. The friction between the road and the car's tire can supply a centripetal acceleration of 1.35 m/s². What is the acceleration the car need to remain in this curve regardless of its acceleration of 1.35 m/s²? a) 2.39 m/s² b) 1.74 m/s² c) 1.35 m/s² d) 1.39 m/s² V₁ = V + at лd²h V= C=d F = ma ac r x=x+(+v₁)t +mgh+Fyud F rarrow_forward9) A bicyclist rides on a circular track. The coefficient of friction between the wheels and the track is 0.8. If the bicyclist maintains a constant speed of 15 m/s, what is the minimum radius of the track so that the bicyclist's wheels will not slip? 10) An object in uniform circular motion makes 15 revolutions every 6 seconds. If its centripetal acceleration is 4.5 m/s², what is the radius of its motion?arrow_forward
- 2. A car travels at a constant speed around a circular track whose radius is 3 km. The car goes once around the circular track in a time of 7 minutes. What is the magnitude of the centripetal acceleration of the car?arrow_forward9. Melissa and Cody are on a fun fair ride that spins them in a circle with radius 6 meters. If Melissa has a mass of 55 kg and Cody has a mass of 65 kg, what centripetal force will they have together if they have an acceleration of 2.2 m/s2?arrow_forwardA roller coaster designer wants to have the coaster car go through a flat hori- zontal curve with an acceleration of 5" and the curve has a radius of 12 m. Determine the velocity the coaster needs to match the desired acceleration. A B 1.0 m/ D 1.1 m/ C 7.7 m/s 56 marrow_forward
- 8. How is it possible that a body moves at a constant speed and is still in accelerating motion? 9. When a car is going around a circular track with constant speed, what provides the centripetal force necessary for circular motion?arrow_forward7. A car travels at a constant speed around a circular track whose radius is 2.6 km. The car goes around the track in 360 s. What is the magnitude of the centripetal acceleration of the car? Answer: ... *.......arrow_forwardCIRCULAR MOTION 1. A centrifuge spins a suspension at 2500 rpm (revolutions per minute) in a radius of 20 cm. What is the acceleration of the suspension? 2. When you take your 1200-kg car out for a spin, you go around a corner of radius 57 m with a speed of 15 m/s. Assuming your car doesn't skid, what is the force exerted on it by static friction? 4740 N (my teacher's answer)arrow_forward
- A 50 Gram sample of Uranium ore is put into a centrifuge that runs at 30,000 rpm. If the radius of the ore's path is 25 cm, Then how many g's of acceleration does the uranium ore experience? a) 2.5 x10^6 g's b) 1.4 x10^5 g's c) 1.4 x 10^6 g's d) 2.5 x10^5 g's e) 4.8 x10^7 g'sarrow_forward3. The Little Prince is a fictional character who lives on a very small The Little Prince. planet. Suppose that the planet has a mass of 2 x103 kg and a radius of 1000 m. (a) How long would it take for an object to fall from rest a vertical distance of 1.00 m? (b) What is the escape velocity from a very small planet? (c) Suppose the Little Prince throws a ball vertically upward, giving it an initial velocity of 1.0 m/s. What would be the maximum height reached by the ball? (d) At what speed could a ball be thrown horizontally so that it would travel in a circular orbit just above the surface of the planet?arrow_forwardAn ultracentrifuge accelerates uniformly from rest to 100,000 rpm in 2.0 min. If this ultracentrifuge accelerates 4.0 seconds starting from rest, what is the magnitude of the centripetal acceleration in unit of gravitational acceleration g for your sample sitting at 4.0 cm from the center axis? Use g = 9.8 m/s2. Hint: compute the centripetal acceleration in unit of m/s2 first, then divided by g will be your answer. For example, if your centripetal acceleration is 19.6 m/s2, your answer measured in unit of g is 2.0.arrow_forward
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College