2 years ago

A crane operater drops the cargo by turning off the electric current to the

1 answer:

7 0

Answer:

A crane operator drops the cargo by turning off the electric current to the electromagnet. Electromagnets can be controlled by controlling the electric current. An electromagnet is stronger if there is more current flowing through it.

Explanation:

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Answer:(a)360N,(b)171N,(c)2.702m

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(a)Maximum Friction Force = $\mu \left ( N\right )=0.4\times \left ( 740+160\right )$

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$cos\theta =\frac{3}{5}$

$sin\theta =\frac{4}{5}$

(b)Moment about Ground Point

$740\times 1\times cos\theta +2.5\times 160\times cos\theta -N_15sin\theta$

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$N_1=171 N$

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(c)

$740\times x\times cos\theta +2.5\times 160\times cos\theta -N_15sin\theta$

Here maximum friction force can be 360 N

Therefore $N_1=360 N$

Where x is the maximum distance moved by man along the ladder

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