HELP ME PLEASE *50 points* Use the diagram on the answer document to answer the following:
A. How much force is necessary to start the object moving?
B. How much force is necessary to keep this object moving?
C. If it starts at rest, will the object start to slide?
D. Depending on "C" either find the acceleration of the object or the additional force
necessary to move it.

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.