A student uses a projectile launcher with a spring constant of 180 N/m to launch a marble with a normal force of 0.9 N vertically into the air. If the spring is initially compressed 0.03 m, what is the maximum height the marble will reach?

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19