Guys i really need help with my physics question: A marble has rolled down a track and into a vertical loop with a diameter of 4.5m. At the top of the loop, the track exerts a downward force on the marble equal to 1.4 times the marble's weight. Determine the speed of the marble at the top of loop.

Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?