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Tell me what the letters of these three formulas mean and how to understand them.

V is the instantaneous speed after time t, and the unit is m/s.

G is the acceleration of gravity in m/s?

T is the descent time in s.

H is the falling height in meters.

V=gt comes from g=v/t, which is the definition of acceleration.

h=gt? /2 is the displacement formula in kinematics.

v? =2gh is also a kinematic formula.