A Toller-coaster vehicle has a mass of 490 kg when fully loaded with passengers (see figure). 15 m 10 m (a) If the vehicle has a speed of 21.0 m/s at point A, what is the force of the track on the vehicle at this point? (b) What is the maximum speed the vehicle can have at point B in order for gravity to hold it on the track? m/s

A Toller-coaster vehicle has a mass of 490 kg when fully loaded with passengers (see figure). 15 m 10 m (a) If the vehicle has a speed of 21.0 m/s at point A, what is the force of the track on the vehicle at this point? (b) What is the maximum speed the vehicle can have at point B in order for gravity to hold it on the track? m/s