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1. You serve a volleyball with a mass of 1.6kg. The ball leaves your hand at 30m/s. The ball has energy. Calculate it.
2. There is a bell at the top of a tower that is 45m high. The bell weighs 13,760 kg. The bell has energy. Calculate It
. 3. A roller coaster is at the top of a 82m hill and weighs 250 kg. At the top of the hill the coaster car has energy. Calculate it.​