SERPSE$104\mathrm{.}5.$OP$\mathrm{.}025.$MI$.$

A train slows down as it rounds a sharp horizontal turn, going from $92\mathrm{.}0k\frac{m}{h}$ to $44\mathrm{.}0k\frac{m}{h}$ in the $17\mathrm{.}0s$ that it takes to round the bend. The radius of the curve is $170m.$ Compute the acceleration at the

moment the train speed reaches $44\mathrm{.}0k\frac{m}{h}.$ Assume the train continues to slow down at this time at the same rate.

magnitude

$\frac{m}{s^2}$

direction

@ backward $($behind the radial line pointing inward$)$

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