Question

Am nevoie de acest exercițiu urgent!

Answer 1

$v_m=\frac{x(4)-x(0)}{4-0}=\frac{9-1}{4}=2ms^{-1}.$

$v(t)=x'(t)=(2t-2)ms^{-1}$

$v(1)=0ms^{-1}.$

$a(t)=v'(t)=2ms^{-2}.$