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Vector products and torque

  • Thread starter Sheneron
  • Start date
360
0
[SOLVED] Vector products and torque

1. Homework Statement
A particle is located at the vector position r = (i + 3j) m, and the force acting on it is F = (1i + 7j) N.
(a) What is the torque about the origin?
(b) What is the torque about the point having coordinates (0, 4) m?

3. The Attempt at a Solution
I got the answer for the first part, but I am confused about part b. At first I thought I was supposed to just switch (i +3j) with (0,4) but that is not right. So then I thought that maybe I was supposed to do this:
(1,3) - (0,4) = new vector, and the coordinates for the new vector to find the torque which would be equal to 8 nm. Is that how I am supposed to do it?
 

Answers and Replies

Shooting Star
Homework Helper
1,975
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Quite correct.
 
360
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I thank ye
 

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