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A hot air balloon is descending vertically with a speed of 4.0 m/s when a passenger drops a 0.5 Kg camera. If the camera is 45 m above the ground when it is dropped: A) What is the speed of the camera just before it reaches the ground? B) How long does it take the camera to reach the ground? C) Find its total energy immediately before hitting the ground. Please show work

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