A 10 kg projectile is fired from a cannon at an angle of 60o above the horizontal and with an initial velocity of 300 ms-1. At the highest point of its flight, the projectile explodes into two fragments with equal mass. One of the fragments falls vertically downwards with an initial velocity of zero. (a) How far from the cannon does the other fragment strike the ground (assume the ground is level)? (b) How much energy is released during the explosion?

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