Physics (Really need help with this)
posted by Mishaka .
An astronaut lands on an alien planet. He places a pendulum (L = 0.200 m) on the surface and sets it in simple harmonic motion.
a. What is the period and frequency of the pendulumâ€™s motion?
b. How many seconds out of phase with the displacements shown would graphs of the velocity and acceleration be?
c. What is the acceleration due to gravity on the surface of the planet in m/s2? Determine the number of gforces.

You will have to examine the graphs, not enough data is written to solve this.