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An explosion breaks a rock into three pa...

An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1kg moves with a speed of `12 ms^(-1)` and the second part of mass 2 kg moves with speed of `8 ms^(-1)`. If the third part flies off with speed of `4ms^(-1)`, then its mass is

A

7 kg

B

17 kg

C

3 kg

D

5 kg

Text Solution

Verified by Experts

The correct Answer is:
D
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