A 2.90kg mass is pushed against a horizontal spring of force constant 25.0N/cm on a frictionless air table. The spring is attached to the tabletop, and the mass is not attached to the spring in any way. When the spring has been compressed enough to store 15.0J of potential energy in it, the mass is suddenly released from rest.

Find the greatest speed the mass reaches.

please help me with the equation. ill try to answer it by my self. just need equation :(

Question

A 2.90kg mass is pushed against a horizontal spring of force constant 25.0N/cm on a frictionless air table. The spring is attached to the tabletop, and the mass is not attached to the spring in any way. When the spring has been compressed enough to store 15.0J of potential energy in it, the mass is suddenly released from rest.



Find the greatest speed the mass reaches. 



please help me with the equation. ill try to answer it by my self. just need equation :(

anonymous · Answer

Same question as before :D
Same formula.

anonymous · Answer

oh ahahah here it goes again :D

anonymous · Answer

im wrong again :( huhuhuhu

anonymous · Answer

Did you use the proper unit? k must be in N/m

anonymous · Answer

but i need to look for the greatest speed?

anonymous · Answer

2 trials and ill get zero -_-