[amp_mcq option1=”P + Q” option2=”$$\frac{{\text{P}}}{{\text{Q}}}$$” option3=”$$\frac{{\text{Q}}}{{\text{P}}}$$” option4=”P – Q” correct=”option4″]
The correct answer is D. P – Q.
The resultant of two forces acting on the same straight line but in opposite directions is the difference between the two forces. In this case, the resultant force is P – Q.
Option A is incorrect because it is the sum of the two forces. Option B is incorrect because it is the ratio of the two forces. Option C is incorrect because it is the reciprocal of the ratio of the two forces.