(a) What is the length of a simple pendulum that oscillates with a period of 2.6 s on Earth, where the acceleration due to gravity is 9.80 m/s2, and on Mars, where the acceleration due to gravity is 3.70 m/s2? LE = 1.68 m LM = 1.68 X What physical quantities affect the period of oscillation of a simple pendulum on Mars? m (b) What mass would you need to suspend from a spring with a force constant of 20 N/m in order for the mass-spring system to oscillate with a period of 2.6 s on Earth, where the acceleration due to gravity is 9.80 m/s, and on Mars, where the acceleration due to gravity is 3.70 m/s2? ME = kg MM kg