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The timber beam is to be loaded as shown. $($Figure $1)$

The timber beam is to be loaded as shown. $($Figure $1)$

Part A

If the ends support only vertical forces, determine the greatest magnitude of $P$ that can be applied. ${}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=21$MPa,${}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=800$kPa.

Express your answer to three significant figures and include the appropriate units.

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