Posted by **Jennifer** on Saturday, March 20, 2010 at 3:42pm.

The maximum weight M that can be supported by a beam is jointly proportional to its width w and the square of its height h, and inversely proportional to its length L.

a. Write an equation that expresses this prportionality

b. Determine the constant of proportionality if a beam 4 in. wide, 6 in. high, and 12 ft long can support a weight of 4800 lb.

c. If a 10-ft beam made of the same material is 3 in. wide and 10 in. high, what is the maximum weight it can support?

So far, I've got the equation. It's M=k^2wh^2/L. I need help working out the problem.

## Answer this Question

## Related Questions

- Math: Calculus - The max. weight M that can be supported by a beam is jointly ...
- physics - If two different masses have the same kinetic energy, their momenta ...
- AlgebraII - PLEASE HELP! I DO NOT KNOW WHAT TO DO? The maximum weight that a ...
- Physics - If two different masses have the same kinetic energy, their momenta ...
- Calculus - A rectangular beam is cut from a cylindrical log of radius 30 cm. The...
- physics - if a stone at the end of a string is whirled in a circle, the inward ...
- calculus - A rectangular beam is cut from a cylindrical log of radius 25 cm. The...
- Inverse Variation - Help me please.. Explain also :( 1. E is inversely ...
- Physics - I have a hard time solving this problem. The weight of an object at ...
- Algebra II - The maximum safe load of a rectangle beam varies jointly as its ...

More Related Questions