A rider has a mass of 50kg. The coefficient of static friction of the body against a wall is 0.8. The diameter of the ride is 10m. What is the maximum period of the ride’s rotation that will keep the student pinned to the wall once the floor drops?

You are driving your car through a roundabout that has a radius of 10 mm. Your physics textbook is lying on the seat next to you. whats the ax speed you can drive before the text book starts sliding

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 80 m and the coefficient of friction is 0.4?

A 48 kg merry-go-round worker stands on the ride’s platform 6 m from the center. If her speed as she goes around the circle is 5 m/s, what is the force necessary to keep her from falling off the platform?

Fans at the Tour de France can be exceedingly annoying, often impeding the cyclists and sometimes causing wrecks. In1994 Laurent Jalabert crashed into a gendarme (policeman) and was seriously hurt.Sometimes riders can stop to avoid a collision, sometimes not. It depends on friction and reaction time. The 95-kg Jalabert was speeding at 40 mph along the level street on a wet day. The coefficient of kinetic friction between his wheels and the road was 0.13. He looked up to see the gendarme about 44 m (about half of a football field) ahead of him. If he has typical human reaction time (0.15 s), how close will he be to the gendarme when he begins to apply the brakes? Round the final answer to two decimal places. As Jalabert skids, what is the magnitude of his acceleration? Round the final answer to two decimal places. How fast was Jalabert going when he hit the gendarme? Round the final answer to one decimal place.

A coin rests on a record 0.13 m from its center. The record turns on a turntable that rotates at variable speed. The coefficient of static friction between the coin and the record is 0.35. What is the maximum coin speed at which it does not slip?

A. Given that a racecar with a mass of 795.0 kg is going through an unbanked curve of a constant radius of 122.0 meters, with racing tires with a static friction coefficient of 0.85 with the race track, what is the maximum speed that the racecar can take with the curve and not slide, assuming the car generates no negative lift? B. How much frictional force does the car need to generate to follow the curve without losing control or slipping? C. Would the speed of the racecar change if the experiment was conducted on an alien planet with a gravity of 8 m/s^2?

A race track curve has a radius of 90 m and is banked at an angle of 15°. the coefficient of static friction between the tires and the roadway is 0.4. a race car with a mass of 1200 kg rounds the curve with a maximum speed to avoid skidding. What’s the normal force on the car as it rounds the curve (exerted by road), the radial acceleration, and speed?

At a circus, a stunt rider is going to do a "Loop-de-Loop". The radius of the circular part of the track is 8.13 m. The mass of the motorcycle and the rider is 318. kg. What is the minimum speed the motorcycle must have to just make it around the loop without falling?

Suppose the coefficient of static and kinetic friction between the road and the tires on a car is 0.60 and 0.30 respectively. The car has no negative lift force. What is the maximum possible speed (in m/s) of the car without slipping as it rounds a flat curve of 32 m radius? Note: write your answer with one decimal place. Answer.