Having Landed On A Newly Discovered Planet An Astronaut Sets Up A Simple Pendulu

Having landed on a newly discovered planet,an astronaut sets up a simple pendulum oflength 1.79 m and finds that it makes 543complete oscillations in 1480 s. The ampli-tude of the oscillations is very small comparedto the pendulum’s length.What is the gravitational acceleration onthe surface of this planet?Answer in units of m/s2