During volcanic explosions, massive fragments can be violently ejected from the crater
of rock: these projectiles are called volcanic bombs. The figure shows a vertical section of the
Mount Fuji, Japan.
a) At what initial speed should it be ejected
from the blowhole A to a bomb, at an elevation of 35°
on the horizontal plane, to fall at the foot of the volcano
in B, which is at a horizontal distance d=9.40
km and at a vertical distance h=3.30 km?
Let's ignore air friction for the moment.