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An explosion blows a rock into three par...

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^(-1) and 2 kg` second part moving with a velocity of `8 ms^(-1)`. If the third part flies off with a velocity of `4 ms^(-1)`. Its mass would be

A

3 kg

B

5 kg

C

7 kg

D

17 kg

Text Solution

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The correct Answer is:
B
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  • 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 m s^(-1) and 2 kg second part moving with a velocity 8 m s^(-1) . If the third part flies off with a velocity of 4 m s^(-1), its mass would be

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