Final answer:
The determination of horizontal and vertical components at pin A requires the angle of the force, which is not provided. However, it is possible to deduce whether forces have horizontal and/or vertical components based on the information given about balanced forces on objects.
Step-by-step explanation:
To determine the horizontal and vertical components of the reaction at pin A, we must apply principles from statics.
We employ relationships such as Ax = A cos Θ for horizontal components and Ay = A sin Θ for vertical components to resolve vectors into their orthogonal (perpendicular) components.
Given forces on objects and knowing their angles, we calculate each component using the provided equations and trigonometric functions.
In this case, without the specific angle Θ or force A, we must rely on additional information provided in the solution options.
If a force has only a vertical component, the horizontal component would be 0, and vice versa.
Choice (b), which states the horizontal component is 0 and the vertical component is 325 N, suggests that the force is acting purely vertically.
Similarly, option (c) suggests that the force is purely horizontal.
Option (d) suggests that the force has equal horizontal and vertical components, which would only occur at a 45-degree angle.
Without the angle Θ or a clear direction of force A provided, we cannot confidently confirm the correct components.
However, according to provided information about block 1 having balanced vertical forces, and no horizontal forces on block 2, we can infer that for block 1, the vertical component may be zero.
In the context of a sample question provided, if we use the information 'horizontal component = 325 N', it suggests that the force has a significant horizontal influence, and thus the correct answer could be either (c) or (d), depending on the angle Θ.
With 'vertical component = 325 N', it hints that the force is also exerting a vertical influence, which again makes the options (b) or (d) possible.