- #1
Mo
- 81
- 0
I have just today revised over simple vetors.I have attempted a few questions, however there is one which, although i worked out the answer for (kind of a fluke!) , i still don't actually understand how/why.
ok the question is:
"One ship sails due south at 7 m/s while another sails due east at 4m/s .What is the velocity of the second ship relative to the first?
I drew out a simple vector diagram with a horizontal and vertical component (its called component right?) and worked out the resultant.The resultant was "square root of (16+49)" .This is 8.06 m/s
I don't understand what i have actually worked out though.What do they actually mean by "relative velocities", if this wasnt in the vectors section of the book, i would have just tried to work out a ratio like 4:7 !
Thanks
Regards,
Mo
ok the question is:
"One ship sails due south at 7 m/s while another sails due east at 4m/s .What is the velocity of the second ship relative to the first?
I drew out a simple vector diagram with a horizontal and vertical component (its called component right?) and worked out the resultant.The resultant was "square root of (16+49)" .This is 8.06 m/s
I don't understand what i have actually worked out though.What do they actually mean by "relative velocities", if this wasnt in the vectors section of the book, i would have just tried to work out a ratio like 4:7 !
Thanks
Regards,
Mo