Tuesday

September 30, 2014

September 30, 2014

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

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.

- Math -
**bobpursley**, Saturday, March 20, 2010 at 4:12pmM=k*wh^2/L

I dont know why you squared k, the constant.

4800=K*4*36*12 note units in*in^2*ft

k=100/36

M=100/36*3*100*10=100,000/36=?

**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 ...

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...

AlgebraII - PLEASE HELP! I DO NOT KNOW WHAT TO DO? The maximum weight that a ...

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 ...

Calc - Find the constant of proportionality for the following situation: "y is ...