In Chapter 8 (Figure), you were asked to calculate the velocity of a frictionless roller coaster car at various locations around the track. To make sure the loops are safe, you must make sure the track can support between two and five times the normal weight (that is, between 2 g and 5 g) of a car.
Figure, the cable must absorb the kinetic energy of the landing jet.

(a) How many g€™s does the 355-kg roller coaster car experience in each loop?
(b) Are the loops safe? If not, explain what can be done to make the loopssafe.