AM-421

Exponential and logarithmic models

A Math · Secondary 3 · Medium · Exponential and logarithmic models

A model suggests that the force

F

N needed to pull a sledge at speed

v

m/s is given by

F = kv^{1.5}

, where

k

is a constant. When

v = 4

, the force is

40

N. What is the value of

k

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