Imagine you are an astronaut who has landed on another planet and wants to determine the free-fall acceleration on that planet. In one of the experiments you decide to conduct, you use a pendulum 0.47 m long and find that the period of oscillation for this pendulum is 1.43 s. What is the acceleration due to gravity on that planet? (Enter the magnitude only.)

Question

I know the formula to use is
T=2pi(L/g)^0.5(g) but I keep getting a wrong answer

Answer 1

t^2=2x3.14x0.47/a
Or, a=6.28x0.47/1.43^2=0.43 m/sec^2