Posted by Nikita on .
A roller coaster ride includes a circular loop with radius R = 13.3 m. What minimum speed must the car have at the top to stay in contact with the tracks?
Did you get the previous problem?
If you have questions, don't be shy to make a follow-up.
Basically, the centripetal acceleration has to offset gravity, 9.8 m/s².
Since the centripetal acceleration is given by v²/r, so we equate the two quantities to get
v²/r = 9.8
= sqrt(9.8*13.3) m/s
= 11.4 m/s.