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
waec 2020furthermathematics

The correct answer is C. p=10, q=- 7

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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