Acar of mass 487 kg travels around a flat, circular race track of radius 53.3 m. the coefficient of static friction between the wheels and the track is 0.19. the acceleration of gravity is 9.8 m/s 2 . what is the maximum speed v that the car can go without flying off the track? answer in units of m/s.

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)