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
Correct Answer: C. p=10, q=- 7
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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