Angular Displacement graph.

What is the period and frequency of the pendulum’s motion?
Frequency: 2 cycles per second Period: 0.5s
How many seconds out of phase with the displacements shown would graphs of the velocity and acceleration be?
What is the acceleration due to gravity on the surface of the planet in m/s2? Determine the number of g-forces.

Question

Angular Displacement graph.

What is the period and frequency of the pendulum’s motion? 
Frequency: 2 cycles per second Period: 0.5s
How many seconds out of phase with the displacements shown would graphs of the velocity and acceleration be?
What is the acceleration due to gravity on the surface of the planet in m/s2? Determine the number of g-forces.

anonymous · Answer

attachment

anonymous · Answer

@zaphodplaysitsafe  Could you help me with this one?

anonymous · Answer

Is my frequency and period correct?

anonymous · Answer

graph looks irregular, but yes your period and frequency looks correct.

anonymous · Answer

The premise is: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, as shown in this graph.  How would I calculate the gravitational acceleration?

anonymous · Answer

@zaphodplaysitsafe

anonymous · Answer

T = 2*pi*(L/g)^1/2

anonymous · Answer

I plugged the variables in and got g = 31.5827 m/s.  This amounts to 3.22054 g's