# spring costant

See attachment.

A 126 g ball is dropped from a height of 64.9 cm above a spring of negligible mass. The ball compresses the spring to a maximum displacement of 4.48716 cm. The acceleration of gravity is 9.8 m/s2.

Calculate the spring force costant k. Answer in units of N/m

https://brainmass.com/physics/conservation-of-energy/physics-calculate-spring-force-constant-k-427413

#### Solution Preview

We can solve this problem using conservation of energy.

Before the ball drops:

Using the final position of the ball as the reference:

The potential energy of the ball is PE = mg(h + x). the kinetic energy is obviously 0.

The potential ...

#### Solution Summary

It shows how to calculate the spring force constant by droping a ball onto it.

$2.49