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- Linda is driving a car around a turn of radius r = 20 m. The road is on a banked curve of 30o. If the coefficient of static friction is 0.35, what is the maximum speed that Linda can safely make the turn?Solve this problem please26. Go A woman is riding a Jet Ski at a speed of 26 m/s and notices a seawall straight ahead. The farthest she can lean the craft in order to make a turn is 22°. This situation is like that of a car on a curve that is banked at an angle of 22°. If she tries to make the turn without slowing down, what is the minimum distance from the seawall that she can begin making her turn and still avoid a crash?
- A curve on a toy race car track is banked at 26.26° and has a radius of 0.20m. With what maximum speed can the toys cars travel around it without needing friction to keep them on the track?Assuming a constant speed, identify which series best shows the relationship between the centripetal force and the radius of a circle and explain why. 20 Series 1 Series 2 Series 3 - Series 4 15 10 101. Toss a solid object at 22 m/s at a 35° angle from 1.2 m off the ground. (a) How high will it go? (b) Find the time needed to hit the ground. (c) How far will it go? (c) With what speed will it hit the ground?
- Under good conditions, a car can travel at a maximum speed of vmax around a particular unbanked curve. In the aftermath of an ice storm, however, driving at that same speed will cause the car to slide off the road. Which of the statements below best describes why this is true? a. The friction force is no longer strong enough to balance the centripetal force and give the car zero acceleration. b. The friction force is needed to do negative work on the car to reduce the car’s kinetic energy. c. The friction force no longer provides a strong enough unbalanced force to change the car’s velocity quickly enough to stay on the curve. d. The car “floats” on the ice reducing the gravitational force which is what keeps the car on the road. e. [All of the above.]A cellphone steps into a “Graviton” and stands up against the frictionalwall. The Gravitron starts to spin and the floor lowers below the cellphone butthe cellphone does not accelerate downwards, she has no net force vertically. Assume:● The radius of the Gravitron is 7.5 m● The cellphone has a tangential velocityof 15 m/s● The man has mass M Determine: Determine the minimum coe cient of static friction between the wall and the cellphone.When a fan is turned off, its angular speed decreases from 168 rpm to 64.0 rpm in 6.08 s. A) what is the angukar acceleration of the fan? B) How fast the edges of the blades are moving (in m/s) at time 6.08 s, if they are 86.0 cm long?
- 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 pavementThe friction force between the tires of a car and the road cause the centripetal acceleration of the car. If the coefficient of static friction is 0.5 and the car has a mass of 1200 kg, what is its centripetal acceleration?Question 8 A car is travelling into an unbanked turn with radius of 11.0 m. The coefficient friction is 1.4. What is the maximum speed the car can travel and still be able to maintain a circular path? Answer in m/s to one decimal place. Your Answer: Answer Question 9 A ball on the end of a string is swung in a vertical circle. The length of the string is 0.4 m. What is the minimum speed required to maintain the circular motion? Answer in m/s to one decimal place. Your Answer: Answer units