A mine shaft has an ore elevator hung from a single braided cable of diameter 2.5 cm. Young's modulus of the cable is 10×1010 N/m2. When the cable is fully extended, the end of the cable is 700 m below the support.

The cable would stretch 14 cm when loaded with 1000 kg ore.

Explanation:

The question is incomplete.

The complete question would be.

A mine shaft has an ore elevator hung from a single braided cable of diameter 2.5 cm. Young's modulus of elasticity of the cable is . When the cable is fully extended, the end of the cable is 700 m below the support.

How much does the fully extended cable stretch when 1000 kg of ore is loaded into the elevator?

Given the diameter of the cable is . The length of the cable is .

And the mass of the ore is . Also the Young's modulus of  elasticity of the cable is .

We will use Hook's law

Where is stress. E is Young's modulus of elasticity. And is strain.

We can rewrite .

Where is the applied force, is the area of the cross-section. is the change in length. is the initial length of the cable.

Also, the applied force is due to mass of the ore. That would be

Given diameter of the cable .

Plugging these values

.

So, the cable would stretch 14 cm when loaded with 1000 kg ore.

0.11 m/s and 0.28 m/s should be correct

it is a negative acceleration