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Given that F = 3i - 12j, R = 7i + 5j and N =...

Further Mathematics
WAEC 2020

Given that F = 3i - 12j, R = 7i + 5j and N = pi + qj are forces acting on a body, if the body is in equilibrium. find the values of p and q.

  • A. p=-10, q=7
  • B. p=-10, q=-7
  • C. p=10, q=- 7
  • D. p-10, q=7
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Correct Answer: Option C
Explanation

If the body is in equilibrium then 

F + R = N 

3i - 12j + 7i + 5j = pi + qj

10i - 7j = pi + qj

p = 10, q = -7


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