2- Two materials, A and B, are used to make cables of identical cross section and length, to lift identical loads.
If A has a greater Young's Modulus than B, which cable
will stretch the most when loaded? Explain why.

Cable  B will more stretch the most.

Explanation:

Given that,

Length of material A =

Length of material B =

If A has a greater Young's Modulus than B.

We know that,

The deflection is defined as,

For material A,

For material B,

The deflection is inversely proportional to the young's modulus.

We need to find which cable  will stretch the most when loaded

Using formula of deflection

Put the value into the formula

So,

Hence, Cable  B will more stretch the most.

truck y has a greater velocity than truck x.