A roller-coaster car has a mass of 509 kg when fully loaded with passengers. http://www.webassign.net/pse/p6-21.gif (a) If the vehicle has a speed of...

A roller-coaster car has a mass of 509 kg when fully loaded with passengers.

http://www.webassign.net/pse/p6-21.gif

(a) If the vehicle has a speed of 20.1 m/s at point A, what is the force exerted by the track on the car at this point?

??? N

(b) What is the maximum speed the vehicle can have at B and still remain on the track?

???/ m/s