A rollercoaster of mass m comes over the top of a 10 m hill ttavelling at 8 m/s what is the speed of the card at the bottom of the hill? After reaching the bottom of the hill the cart goes around a loop, if the loop is 8 m tall, what is the speed of the cart at the top of the loop? At the end of the tract is a 15 m tall hill, will the cart be able to reach the top? Why?

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