Answer
Please see the work below.
Work Step by Step
We know that
$v_f^2-v_i^2=2ax$
$(\frac{70}{3.6})^2-(\frac{110}{3.6})^2=(2)(a)(1900-1000)$
This simplifies to:
$a=-0.31\frac{m}{s^2}$
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