An explosion blows a rock into three parts Two parts go off at right angles to each other These two are, 1 kg first part moving with a velocity of 12 ms and 2 kg second part moving with a velocity of 8 ms If the third part flies off with a velocity of 4 ms', its mass would be (a) 7 kg (c) 3 kg (b)...

An explosion blows a rock into three parts. Two parts go off at right angles to...

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Physics Principles with Applications

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