n: The turns at the Daytona Internatic radius of 300m and are banked at 31° ionless, what speed must a NASCAR d n the track? b) If the coefficient of sta + ic the maxi mum cnood without hittir
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- it takes a 600kg racing car 10 secs to travel at a uniform speed around a circular track with a radius of 50m. What average force must the car's tires exert against the track tp maintain this circular motion? What is the acceleration of the car?ans. a) 18.8 m/s c) 10.8 m/s c) How fast can the car take a 40-m radius turn when the pavement is icy? b) How fast can the car take a 40-m radius turn when the pavement is wet? a) How fast can a 2000-kg car take a 40-m radius turn when the pavement is dry? is dry, us = .6 when the pavement is wet, and µs = .3 when the pavement is icy. The mass of the car is 5. The coefficient of static friction for a certain kind of pavement and tires is u, = .9 when the pavementA roller-coaster track is set with hills and valleys as shown in the figure. A roller-coaster car crests hill "A" at 5 m/s. What force will provide the centripetal force needed for the car to stay on this circular path? 200 OA Weight OB Tension OC. Normal force Op Friction C 160 m
- A BMX biker wanted to impress his family by catching some air( aka leaving the ground) while riding over a hill in Tennesse with a radius of curvature of 7.6m. If the BMX biker rides over the hill at 11.2 m/s, will she catch some air and excitee her family? B) What is the minimum speed the biker has to travel in order to leave the ground when cresting the hill?m R A racing greyhound can run around curves at high speed. Suppose the radius of a semicircular turn on a dogtrack is 21.6 m, and the speed of a greyhound is constant at 15.1 m/s; assume the dog's mass is 22.7 kg. What is the acceleration of the greyhound on the turn? (in m/s^2) OA: 4.487 OB: 5.070 OC: 5.729 OD: 6.474 OE: 7.316 OF: 8.267 OG: 9.342 OH: 10.556nknown distance a the initial bullet speed vo. The the vertical distance h. What was the to- late its numerical value for vo = 1500 m/s and h= Vo=1500mls h=1.5 3. A car travels on a circular road with radius R and banking angle e chosen so that at the speed v the friction force vanishes (the optimal this road at rest? Investigate the cases of small and large v. banking). What is the friction force acting on the car of mass m on (7186) (T-0): k5 (W₁-0₂ 159 (9186); (T-100) = 4014² T-401437 XX₁ +Q₂ +Q3 = 066.6 X 10³J² + 837 = T +4014 37-4014373 = 837+4014=
- If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a problem on icy mountain roads). a. Calculate the ideal speed to take a 100.0 m radius curve banked at 12°. Videal = m/s b. What is the minimum coefficient of friction needed for a frightened driver to take the same curve at 20.0 km/h? Hmin = Submit Question6. a. You're driving over the top of a hill with a radius of 15.075 m. How fast would you need to drive over it to just bounce off your seat as you go over the top? Previous submissions: b. How fast would you need to drive over the top for the normal force of the seat pushing up on you to be half your weight? Previous submissions:What is the maximum safe speed that this tire can handle when properly inflated and in good condition in m/s? Hint: Put only the final answer in m/s. DO NOT write the unit. ONLY write the answer as a number like. 234,43 R 16 87V 195/ 55
- A car is approaching a wall at a speed of 27.1 m/s. If the distance d is 100 m, a. Determine the friction coefficient required to stop the car before it hits the wall. b. Determine the friction coefficient necessary for the car to avoid the wall by turning (not braking) and following the circular path shown. (friction supplies the centripetal force)In 1959, Daytona Speed was added to the NASCAR racing circuit and introduced 31° banked curves for racing. This allowed stock cars to reach much higher speeds (around 200 mph) during a race. Today the steepest banked curves are found at Talladega Motor Speed Way at 33° with a turn radius of 1100 ft. The flattest track in NASCAR is Hew Hampshire Motor Speed Way with banked curves of 7° with a turn radius of 410 ft. a) Assuming no friction, what are the max speeds (in mph) without slipping toward the outer edge of the track at the Talladega and NH Motor Speedways? b) With friction (assume μs of 1.1 between the tires and the track)?0-2. An automobile drag racer drives a car with acceleration a and instantaneous veloc- ity v. The tires (of radius r) are not slipping. Find which point on the tire has the greatest acceleration relative to the ground. What is this acceleration?