Question: Two construction workers pull on the control lever of a frozen valve (Figure P4.14). The lever connects to the valves stem through the key that

Two construction workers pull on the control lever of a frozen valve (Figure P4.14). The lever connects to the valve’s stem through the key that fits into partial square grooves on the shaft and handle. Determine the net moment about the center of the shaft.

Figure P4.14

200 NA300 N 20° 250 mm

200 NA300 N 20 250 mm

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