7 A roller Goaster car starts with an initial speod of 0,375 m's from the top of a section of a
track that is sloping down at 26.2 to the horicontal. After traveling 80.3 m, t reaches the end of
thut section of the track and continues up the nest section of the track that slopes up at 22.4° to
the horiontal. this section of the track has a length of 73.2 m, will the car reach the top of the you
can neglect friction and that the car has no source of power section? Assume that (10 pts.) 73.2
26
Solution
Initial height: h = 80.3m * sin26.2º = 35.5 m
Height of next incline: H = 73.2m * sin22.4º = 27.9 m
So, YES, even without the initial kinetic energy, the coaster can reach the top of the incline.