APFIVE Fluid Drag Proportional to Velocity
A small object moves horizontally through a fluid with initial velocity v₀. If the only horizontal force acting on it is fluid resistance proportional to velocity, which expression correctly describes its velocity v after time t?
A
v = v₀e^(-kt/m)
B
v = v₀/(1 + kt/m)
C
v = v₀ - kt/m
D
v = v₀(1 - e^(-kt/m))
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