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A ball of mass 7 kg is thrown straight up in the earth's gravitational field with an initial speed v0 = 16 m/s.

a) What is the initial kinetic energy of the ball?

b) How much work does the gravitational force do on the ball if it goes up to a height h = 1.9 m?

c) What is the speed of the ball at a height h = 1.9 m?

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