Supports & ReactionsWhat each support blocks, and how many unknowns it adds to the problem.Mechanical EngineeringUnknown count is for plane problems unless marked.SupportBlocksUnknownsRollerMotion normal to the surface1Pin or hingeMotion in both directions2Fixed or built-inBoth motions and rotation3CableMotion along the cable1Smooth contactMotion into the surface1Ball and socket, 3DAll three translations3A cable pulls only; it can never push. If your answer puts a cable incompression, it is slack.Supports & Reactionslearnposters.com
Supports & Reactions — printable engineering wall chart from LearnPosters. Free vector PDF, US Letter and A4.

What’s on the Supports & Reactions poster

A 6-row table: Support · Blocks · Unknowns.

Unknown count is for plane problems unless marked.

A cable pulls only; it can never push. If your answer puts a cable in compression, it is slack.

Questions about the Supports & Reactions poster

What’s on the Supports & Reactions poster?
A 6-row table: Support · Blocks · Unknowns. Unknown count is for plane problems unless marked. Roller — Motion normal to the surface — 1; Pin or hinge — Motion in both directions — 2; Fixed or built-in — Both motions and rotation — 3; Cable — Motion along the cable — 1; Smooth contact — Motion into the surface — 1; Ball and socket, 3D — All three translations — 3. A cable pulls only; it can never push. If your answer puts a cable in compression, it is slack.
Who is the Supports & Reactions poster for?
Supports & Reactions belongs to the Mechanical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning statics & dynamics can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Supports & Reactions poster?
When you are drawing a free body and need to know what to put at each end. A wall chart earns its place by being glanceable from where the work is happening, so Supports & Reactions belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
What other posters go with Supports & Reactions?
Drawing a Free Body, Finding a Centroid and Dry Friction sit alongside Supports & Reactions in the Mechanical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Drawing a Free BodyFinding a CentroidDry Friction
Is the Supports & Reactions poster free to download and print?
Yes. Supports & Reactions downloads as a free PDF with no account, no email and no watermark, like everything else in the Mechanical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Supports & Reactions poster print at?
Supports & Reactions is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Supports & Reactions loses nothing.Printing guide

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