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A bullet with a mass of 0.3 kg and unknown speed collides with a 4-kg bag...

A bullet with a mass of 0.3 kg and unknown speed collides with a 4-kg bag suspended at rest from a 0.5 m-long rope. After the collision the bag rises until the rope forms an angle of 30º with the vertical, meanwhile the bullet, after crossing the bag, describes a parabola, with the point of impact being 20 m from horizontal distance and 1.5 m by below. The speed of the bullet before impacting with the bag and the tension in the rope when the angle with the vertical is 10º, will be
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