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I dont understand how to get velocity from (6.00i - 1.00j) ?

  • Thread starter nukeman
  • Start date
  • #1
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I dont understand how to get velocity from (6.00i - 1.00j) ??

Homework Statement



Hey all, I have a problem where I am asked to find the velocity of something, but some data I am given says: "A 3.00kg object has a velocity (6.00i - 1.00j) m/s "

What is the velocity of that? I dont quite understand how to get vel from that vector.

Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
993
13


You are given the two components of the vector v. Phytagoras will tell you how to find the magnitude of the velocity vector.
 
  • #3
655
0


I was reading over, and it says v^2 = v * v

?

so, is it v = square root 6?
 
  • #4
sophiecentaur
Science Advisor
Gold Member
24,281
4,307


Wot, no notes or text book?
Whats 6squared + 1squared?

Look up how to find the magnitude and direction of a vector, given it's xy components. Or even how to find the resultant of two vectors at right angles.
 
  • #5
993
13


I think that you were reading that the dot product (or scalar product) of the two vectors [itex]\underline{v}[/itex] gives the MAGNITUDE of the vector [itex]\underline{v}[/itex].

i.e.[itex]\underline{v}[/itex].[itex]\underline{v}[/itex]=v[itex]^{2}[/itex]
 
  • #6
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,798
1,666


Have you studied vector mechanics?
 

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