MCQOPTIONS
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MCQOPTIONS
| 1. |
An explosion blows a rock into three parts. Two parts go off at right angles of 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 of \[8\,m{{s}^{-1}}\]. If the third part files off with a velocity of \[4\,m{{s}^{-1}},\] its mass would be : |
| A. | 5 kg |
| B. | 7 kg |
| C. | 17 kg |
| D. | 3 kg |
| Answer» B. 7 kg | |