You have been abducted by aliens and find yourself on a strange planet. fortunately, you have a meter stick with you. you observe that, if the stick oscillates around one end as a physical pendulum, it has a period of 0.85 s. what is the acceleration of gravity on this planet? a 9.8 m/s2 b cannot be calculated without knowing the mass of the stickc 36 m/s2 d 18 m/s2 e 27 m/s2