A 4400 kg roller coaster starts out at rest at the beginning of the track, 20.0 m above the ground. Assume that friction is negligible. (a) A force pulls the roller coaster up along the 35° incline, until it is at the top of the first slope, 150.0 m above the ground. At the top of this slope, the roller coaster has a speed of 4.18 m/s. What is the magnitude of the force that pulled the roller coaster up along the incline? (b) What is the maximum speed this roller coaster will reach as it travels the track? (c) At one point in the track, there is a circular loop, with the bottom point on the ground and the top point 95.0 m above the ground. What is the speed of the roller coaster at the top of this loop?

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