Answer:
C. 7350 J
Explanation:
The total mechanical energy of an isolated system, given by the sum of its potential energy and its kinetic energy, is constant:
[tex]E=PE+KE=const.[/tex]
where
PE is the potential energy, the energy due to the location of the object in the gravitational field
KE is the kinetic energy, the energy due to the motion of the object
In this problem, the diver is initially standing on the platform with a potential energy of
PE = 7350 J
At the beginning, the diver is at rest, so its kinetic energy is zero:
KE = 0
However, as he falls down, its potential energy converts into kinetic energy, since the height decreases but the speed increases.
Eventually, when the diver reaches the water, all its potential energy has converted into kinetic energy, so we will have:
PE = 0
KE = 7350 J
So, the final kinetic energy is 7350 J.
