How many centimeters need to compress an ideal spring, whose spring constant is worth 200 N / m for a 2.0 kg body reaches a height of 4.0 meters on the ramp of the figure below. Disregard any kind of friction and if necessary use g = 9.8 m / s ^ 2.

Question

anonymous · Answer

question which is correct?

anonymous · Answer

@douglaswinslowcooper @ganeshie8 @Vincent-Lyon.Fr

vincent-lyon.fr · Answer

What do you think?

anonymous · Answer

complicated that I can not ... this formula? 1/2kx ^ 2 = mgh

vincent-lyon.fr · Answer

Correct :))

anonymous · Answer

@douglaswinslowcooper 

I do not understand how to ride the equation, can you help me?

anonymous · Answer

E = (1/2)*k*(x^2).
E = (1/2)*200*(4.0^2) ??????????????

anonymous · Answer

$\frac{1}{2}kx ^ 2 = mgh$
you are looking for the compression of the spring, $x$
so it will be $\Large x=\sqrt{\frac{2mgh}{k}}$, then after you find the value of x, convert it to cm