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**Multiple force constants/Single mass?: SHM, Spring w/ mass.**

## Homework Statement

Kim drives her empty dump truck over a berm (also called a speed bump) at the contruction site. The truck has a mass of 3000kg and the force constant for one of the truck's springs is 100,000N/m (Remember, truck has 4 wheels).

a)What is the resulting period of the bouncing truck as it goes over the bump?

b)If Kim leaves the contruction site with a load of dirt in her truck, what will this do to the period of her dump truck as truck crosses berm?

## Homework Equations

http://people.scs.fsu.edu/~dduke/manual/Hooke_files/default_files/Hooke_files/Image294.gif [Broken]

## The Attempt at a Solution

For part B, evaluating the equation and plugging in random numbers.. I'm pretty sure that more mass would result in a longer period..

For part A, what's getting me is the (Remember, truck has 4 wheels) part.

I can do T=2pi[square root (3000kg/(100000N/m)] which comes out to be 1.1s.. Or I don't know if I should multiply or divide or keep the 100000N/m by 4.. I think I've done as much work as I can without going in circles.. Would anyone like to tell me what I should do with the force constant (100000N/m)?

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