Posted by Mark on .
If a masss of 65kg is dropped 4.3m onto a spring with a stiffness coefficient of 6.2x10^4 n/m, how far is the spring depressed?

physics 
drwls,
M g (H +x) = (1/2)kx^2
Solve for x.
H = 4.3 m
k is the spring constant
M is the mass 
physics 
Mark,
Thanks

physics 
drwls,
You're welcome.
They may want you to solve it without the x on the left side. That will give you nearly the same answer, and make solving easier, but it will be wrong. Gravity continues to act as the spring is compressed. 
physics 
hollie,
how much force is required to accelerate an 8.00 kg mass at 15.00 m/s2?