This is very hard, I don't understand.

What is the maximum acceleration of the wing tips, in units of g?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.