MCQOPTIONS
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MCQOPTIONS
| 1. |
A 5000 kg rocket is set for vertical firing. The exhaust speed is \[800\,m{{s}^{-1}}\]. To give an initial upward acceleration of \[20\,m{{s}^{-2}}\], the amount of gas ejected per second to supply the needed thrust will be \[(g=10\,m{{s}^{-2}})\] [CBSE PMT 1998] |
| A. | \[127.5\,kg\,{{s}^{-1}}\] |
| B. | \[187.5\,kg\,{{s}^{-1}}\] |
| C. | \[185.5\,kg\,{{s}^{-1}}\] |
| D. | \[137.5\,kg\,{{s}^{-1}}\] |
| Answer» C. \[185.5\,kg\,{{s}^{-1}}\] | |