Answer:
Maximum 13 m overhang
Explanation:
Since the brick is uniform. Its mass must be equally distributed along its length. So the center of mass is in geometric center, which is 26 / 2 = 13 m from each end of the brick.
For the brick to not tip over, its center of mass must NOT be overhung over the edge. It stays just on the edge. So the maximum overhang is 13 m.
B.
The original energy is mgh. The final energy is 1/2 mv^2.
The energy that is not converted to kinetic energy is the work done against resistive forces, which is mgh - 1/2 mv^2.
Its quite hard to give you facts over this but just type into google facts about the sonar/lunar eclipse.