Asked by Anonymous

A roller-coaster car speeds down a hill past point A where R1 = 8.0 m and then rolls up a hill past point B where R2 = 14.0 m.

The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car of 2.19 multiplied by 104 N at this point, what is the mass of the car?
Answered by bobpursley
I don't understand what R1 and R2 are. Are they heights?
Answered by Anonymous
fdh
Answered by Mateo
R1 and R2 are both the radius of the circles at the bottom and top respectively. I don't know the answer, I'm looking into that as well. At least you know that it's a radius now! :D
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