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How much work is done in lifting a 6 kg object from the ground to a height of 4m?

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1 answer:

Gekata [30.6K]3 years ago

8 0

W=mgh W=(6)(9.8)(4) W= 235.2J

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The allow factor of safety:

$\sigma _{a} =\frac{\sigma }{factor-of-safety} =\frac{270}{2} =135MPa$

The minimun wall thickness:

$t=\frac{Pd}{4\sigma _{a} } =\frac{1.26*8.1}{4*135} =0.0189m$

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