Answer : 9.81 meters per second.
Explanation : As Woodpeckers are observed to obtain their food by pounding their beaks on tree trunks. Which they it at 98.1 meters per second and it is 10 times the acceleration due to gravity.
So, we can simply divide it and find out the acceleration due to gravity.
98.1/10 = 9.81 meters per second.
Therefore, acceleration due to gravity will be 9.81 meters per second