Hi! Im reviewing for Physics and there are some problems that i dont understand. I already solved all of them but idont know the formula for some of them so i want to check my answers pls help me understand and check 1-5? Thank you!!THE MASS OF THE COASTER IS 0.002 kg) **( THE VELOCITY IS 0 m/s)1.)in position #2, the coaster reaches a height of 3.02 m. If the rollercoaster is frictionless, what minimum velocity should the roller coaster have (critical velocity) to make it through the loop?2.) If the coaster started at a height a = 5.39 m, how much kinetic energy will it have at point #3?3.)If the coaster started at a height a = 5.71 m, how fast will it be travelling at point #3?4.) Later in the ride, the coaster enters a horizontal loop with radius of 0.02 m. If the coaster spends 0.21 seconds travelling the loop, what is the average tangential velocity of the marble.5.) The coaster goes into a 2nd (horizontal loop) with a radius of 0.02 m. If it spends 0.33 seconds travelling the horizontal loop, what is the centripetal acceleration that it experienced? .

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