A 1.50 kg snowball is fired from a cliff 12.5 m high. The snowball's initial velocity of 14.0m/s, directed 41.0 degrees above the horizontal. (a) How much work isdone on the snowball by its weight during its flight to the groundbelow the cliff?  (b) What is the change in the gravitational potential energy of thesnowball-Earth system during the flight? (c) If that gravitational energy is taken to be zero at the height of the cliff, what is its value when the snowball reaches the ground?

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