A turn on a racing track follows a horizontal circular arc of radius 60 m. The track at this turn is banked at an angle of to help motorcycles go round it at speed without slipping. Given that the maximum speed one particular motorcyclist can go around it without slipping is 89 km/h, find the coefficient of friction between her motorcycle’s tyres and the track. Take and give your answer correct to two decimal places.
A particle moves along a horizontal circular path of radius 3.8 m at a constant speed of 3.8 m/s. What is the acceleration of the particle?
A plane weighing 78 metric tons and flying at 749 km/h turned in a clockwise direction from due east to due south while banked at an angle to the horizontal, moving in a horizontal circular arc. If it took the plane 41 seconds to change its course, determine the magnitude of the lift force perpendicular to its wings. Give your answer correct to one decimal place. Take .