Ben 10 Alien Force Action Figures

How do you calculate initial kinetic energy?

The masses of the javelin, discus, and shot are 0.80 kg, 2.0 kg and 7.2 kg, respectively, and the record throws in the corresponding track events are about 98 m, 74 m, and 23 m, respectively.

Neglecting air resistance, calculate the minimum initial kinetic energies that would produce these throws and estimate the average force exerted on each object during the throw, assuming the force acts over a distance of 2 m.

I know that initial kinetic energy is KEi = 1/2 m * Vi^2 but I cant figure out how to get the velocity from the information given in the problem.

Please help me understand. I am on the last question and am stuck.

Thanks in advance

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