A 150.0 kg cart that rides down a set of tracks on four solid

A 150.0 kg cart that rides down a set of tracks on four solid steel wheels, each with radius 20.0 cm and mass 45.0 kg. The tracks slope downwoard at an angle of 20degrees to the horizontal.If the boat is released from rest a distance of 16m from the water (measured along the slope), how fast will it be moving when it reaches the bottom? Assume the wheels roll without slipping, and that there is no energy loss due to friction.answer is 7.17m/s



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