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A pencil sketch of a mechanical diagram showing a beam connected to a vertical support by a pin, with dimensions 4.0 m and an angle of 20 degrees labeled.

A pencil sketch of a mechanical diagram showing a beam connected to a vertical support by a pin, with dimensions 4.0 m and an angle of 20 degrees labeled.

The beam shown below has a length of 4.0 meters and is angled at 45°. The left end is connected to the ground by a pin, which is free to slide in a slot that makes a 20° with the vertical See more