Question

A spring with constant k = 50 N/m is compressed by d = 2 m, by pushing the mass shown... bla bla look at the link =>> http://i.hizliresim.com/2g86W0.png
thanks for help

Answer 1

thanks for help. but how can i find the distance between points O and B ?

Answer 2

Hint:
the kinetic energy of the released mass, at point B, is given by the subtraction between the kinetic energy of our mass at point A minus the work done by the friction force. Furthermore, that residual kinetic energy will transform into the final potential energy at point C. So we can write:
\[\Large \frac{1}{2}k{d^2} - {F_r}L = mgh\]
where F_r is the friction force, acting on our mass m

Answer 3

Isn't the answer simply the sum of the energy required to compress the spring and the work needed to overcome the frictional force? I don't really see how the mass of the object and the inclined plane is related to this question.