# Spring constant

1. Nov 14, 2007

### NewJersey

A spring constant stores 25J of energy when compressed by 7.5cm
a) Find the spring constant
b) Find the force to compress the distance

2. Nov 14, 2007

### firefly_1

For part (a), you'll need to know the equations to find the spring constant based off of the energy [E] that is exerted to move it the distance [x] it moves, which is also equal to its amplitude [A].

For (b), the force exerted can be found by using the spring constant value you found in (a) and muliplying it by the distance it is compressed.
$$F_{x} = - kx$$