• # question_answer Wind is blowing at constant velocity$\text{\vec{V}}$towards west. A man initially at rest start moving with constant acceleration $a$ towards north. Then the moment of time at which direction of wind appears south west to him is A) $\frac{\left| \overset{\to }{\mathop{V}}\, \right|}{\left| \overset{\to }{\mathop{a}}\, \right|}$                                            B) $\frac{\left| 2\overset{\to }{\mathop{V}}\, \right|}{\left| \overset{\to }{\mathop{a}}\, \right|}$ C) $\frac{\left| 3\overset{\to }{\mathop{V}}\, \right|}{\left| \overset{\to }{\mathop{a}}\, \right|}$                                          D)  none of these

${{\overset{\bullet }{\mathop{\text{V}}}\,}_{\text{Wind/Man}}}={{\overset{\to }{\mathop{\text{V}}}\,}_{\text{W}}}-{{\overset{\to }{\mathop{\text{V}}}\,}_{\text{M}}}$$|{{\overset{\to }{\mathop{\text{V}}}\,}_{\text{M}}}|=|{{\overset{\to }{\mathop{\text{V}}}\,}_{\text{W}}}|$ $\text{V}=0+$at$t=\frac{|\overset{\to }{\mathop{\text{V}}}\,|}{|\overset{\to }{\mathop{\text{a}}}\,|}$