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Velocity Functions with Calculus

2. 1D Motion / Kinematics / Velocity Functions with Calculus / 문제 3

문제 3

If $x (t) = 5 t^{3} - 4 t + 2$ meters, what is the instantaneous velocity at $t equals 2$ $s$ ?

A

$58$ $m/s$

B

$56$ $m/s$

C

$36$ $m/s$

D

$26$ $m/s$