Simplify the following text for a Grade 11 native English-speaking person.
Original: Dynamic pressure is closely related to the kinetic energy of a fluid particle , since both quantities are proportional to the particle 's mass ( through the density , in the case of dynamic pressure ) and square of the velocity . Dynamic pressure is in fact one of the terms of Bernoulli 's equation , which is essentially an equation of energy conservation for a fluid in motion .
Simplified: In fluid dynamics dynamic pressure depends on density and velocity of the fluid .