A massless spring of spring constant 20 N/m is placed between two carts. Cart 1 has a mass M1 = 5 kg and Cart 2 has a mass M2 = 3.5 kg. The carts are pushed toward one another until the spring is compressed a distance 1.8 m. The carts are then released and the spring pushes them apart. After the carts are free of the spring, what are their speeds?
i know both momentum and energy conservation applies here, but don't know where to start...
both carts are initially at rest,
so I'm guessing : PE(initial) = PE(final) + KE (final)
i know both momentum and energy conservation applies here, but don't know where to start...
both carts are initially at rest,
so I'm guessing : PE(initial) = PE(final) + KE (final)