Having landed on the surface of a newly discovered planet with a free-fall(gravitational) acceleration different from that of earth's, an astronaut sets up a simple pendulum by hanging a 0.2kg mass from a 0.6m long string. The astronaut observes the pendulum make 21,0 complete oscillations in 59 seconds.

1. What is the period of the pendulum on the surface of this planet?

2. What is the value for the free-fall (gravitational) acceleration on this planet?

3. Which would be the period of this pendulum on the surface of the earth?