Hint: Aluminum vs. Steel Material Properties
You have 5kg of Aluminum and 5kg of Steel. You can make whatever cross section beam you want with these materials. If you have to make a cantilever beam 1m long with a load at the end and you want to minimize the deflection. What material would you use?
I’d use the steel just because it has a higher Young’s modulus, and probably use an I-beam cross section. Right?