Been on this problem for 2 hours now:
Four identical springs support equally the weight of a 1150kg car.

If a 91kg driver gets in, the car drops 6.8mm . What is k for each spring?

The car driver goes over a speed bump, causing a small vertical oscillation. Find the oscillation period, assuming the springs aren't damped.

Im assuming for Part A its K=mg/x then divide by 4, so what am I doing wrong?? :/

Question

Been on this problem for 2 hours now:
Four identical springs support equally the weight of a 1150kg car.

If a 91kg driver gets in, the car drops 6.8mm . What is k for each spring? 

The car driver goes over a speed bump, causing a small vertical oscillation. Find the oscillation period, assuming the springs aren't damped.


Im assuming for Part A its K=mg/x then divide by 4, so what am I doing wrong?? :/

anonymous · Answer

That should be right, assuming the mass you're using is the mass of the person.

anonymous · Answer

are you making sure that your value for x is in meters? you have to convert 6.8mm to meters so it would be 0.0068m. 

Then, by my calculations your k would equal 42279.4.