A glider with mass m = 0.210kg sits on a frictionless horizontal air track, connected to a spring with force constant k = 5.20N/m . You pull on the glider, stretching the spring 0.130m , and then release it with no initial velocity. The glider begins to move back toward its equilibrium position (x=0).

Question

anonymous · Answer

Is there more?

anonymous · Answer

What is the speed of the glider when it returns to x=0?

anonymous · Answer

What must the initial displacement of the glider be if its maximum speed in the subsequent motion is to be 3.00m/s ?

anonymous · Answer

what's the energy in the spring when it's stretched .130 m?

anonymous · Answer

any ideas?

anonymous · Answer

nope. :(

anonymous · Answer

do you have any solution that can guide me?

anonymous · Answer

are you doing work/energy theorem?

anonymous · Answer

yes

anonymous · Answer

cool.

anonymous · Answer

i got 3 zero's already . -_- i cannot have any mistake now. it will fail me -_-

anonymous · Answer

you should be given an expression for the energy a spring stores when compressed or stretched
if not you can integrate to find the work required to compress/stretch
$$W =\int\limits_{ }^{ } F*dx = \int\limits_{ }^{} -kx*dx =   ?$$

anonymous · Answer

Any luck finding the expression in your notes or text?  Or, alternately, evaluating the integral?

anonymous · Answer

thats the given only. its an online physics assignment so its so hard -_- the given is only that. oh my god -_-

anonymous · Answer

University of Phoenix?

anonymous · Answer

sears and zemansky's university of physics with modern physics

anonymous · Answer

http://www.physicsclassroom.com/class/energy/u5l1b.cfm

anonymous · Answer

thanks:)

anonymous · Answer

Did you find the expression for energy in a spring?

anonymous · Answer

not yet. this subject is so difficult. and integral also -_- im doom.