maheshmeghwal9
  • maheshmeghwal9
I E Irodov Q. : - 1.11
Physics
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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maheshmeghwal9
  • maheshmeghwal9
1 Attachment
maheshmeghwal9
  • maheshmeghwal9
http://irodovsolutionsmechanics.blogspot.in/2007/07/problem-111.html
maheshmeghwal9
  • maheshmeghwal9
Please help me understand this.

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mathslover
  • mathslover
|dw:1342517090459:dw|
maheshmeghwal9
  • maheshmeghwal9
k i wanna understand wt he has done after dot product i mean http://1.bp.blogspot.com/_v9nwkZLKggs/RpeUAYuKqCI/AAAAAAAABS0/RzCY7Orzo70/s1600-h/1.11_3.JPG
mathslover
  • mathslover
|dw:1342517323761:dw|
maheshmeghwal9
  • maheshmeghwal9
how u gt the marked one thats was my question|dw:1342517495860:dw|
maheshmeghwal9
  • maheshmeghwal9
so how?
mathslover
  • mathslover
http://en.wikipedia.org/wiki/Dot_product have a look here .. u may get ur answer here
mathslover
  • mathslover
I have to go for now ... will have a look to it later . @mukushla will help u further
maheshmeghwal9
  • maheshmeghwal9
but if theta is 90 degree this must be zero then from where did this |dw:1342517733888:dw|