5) You are on a rocketship that has just landed on another planet. Fortunately, you have brought a few pieces of equipment from the physics lab with you - a meterstick, a spring, and a mass (.5 kg). When you hang the mass from the spring, it extends by 20 cm as it reaches its equilibrium position. You then pull the mass down and it oscillates up and down. You brought your cell phone, and you use it to time the motion - it undergoes 10 What is the acceleration due to gravity on this planet? oscillations in 4.2 seconds.