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http://users.on.net/~rohanlal/roll.jpg [Broken]

A roller-coaster car has a mass of 494 kg when fully loaded with passengers.

If the car has a speed of 12.5 m/s at point A, what is the force exerted by the track on the car at this point?

To solve this don't i need to determine what the downward component of it's velocity is so i can determine the normal force on the track at point A? How can I do that when no angles are given?

A roller-coaster car has a mass of 494 kg when fully loaded with passengers.

If the car has a speed of 12.5 m/s at point A, what is the force exerted by the track on the car at this point?

To solve this don't i need to determine what the downward component of it's velocity is so i can determine the normal force on the track at point A? How can I do that when no angles are given?

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