Slider Crank Mechanism in SOLIDWORKS

A: Governing principle: the drawing is the legal contract and defines nominal geometry. Applied here: a parametric deviation hidden in equations breaks configuration control even if GD&T allows it, and it will poison tolerance stack analysis later. Distractor that traps people: Option A appeals to tolerance logic but ignores document hierarchy and change control under ISO-style practices.

A: Governing principle: slider stroke is primarily 2R, with rod length affecting only secondary motion. Applied here: a 4:1 rod‑to‑crank ratio keeps deviation small, so 2 × 40 mm is the right order before detailed kinematics. Distractor that traps people: Option B pulls in the right physics but overestimates the effect without checking the ratio.

A: Governing principle: verify hardware geometry before assuming a simulation defect. Applied here: binding at dead center often comes from small length or parallelism errors that only show up when metal is involved. Distractor that traps people: Option C feels CAD‑savvy but skips the physical verification step needed for acceptance.

A: Governing principle: mates represent physical constraints, not just alignment. Applied here: a coincident mate can lock rotation that a pin joint must allow, changing kinematics under motion. Distractor that traps people: Option A comes from 2D thinking and ignores rotational DOF.