A 1.1 kg cart and a 2.2 kg cart are at rest with a compressed string between them. the force constant of the spring is 600 N/m. when the spring is released, the carts rapidly separate. how far must the spring have been compressed for the 2.2 kg cart to end up moving at 1.5 m/s?
(involves both momentum and energy)
p = mv
Ek = 0.5mv2
Ep = 0.5kx2
The Attempt at a Solution
i dont even know where to start !!