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Problem $13\mathrm{.}124-$ Safety ramps

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Steep safety ramps are built beside mountain highways to enable vehicles with defective brakes to stop. A $18-$ton truck enters a $15\backslash$deg

ramp at a high speed v$0=108$ ft$/$s

and travels for $6$ s before its speed is reduced to $36$ ft$/$s$.$ Assume constant deceleration and neglect air resistance and rolling resistance.

Problem $13\mathrm{.}124.$a $-$ Braking truck on a ramp

Determine the magnitude of the braking force.

The magnitude of the braking force is

lb$.$ Required Information

Problem $13\mathrm{.}124-$ Safety ramps

Steep safety ramps are bult beside mountailn highways to enable vehicles with defective brakes to stop. A $18-$ton truck

enters a $15$ ramp at a high speed $v_0=108f\frac{t}{s}$ and travels for $6$ s before its speed is reduced to $36f\frac{t}{s}.$ Assume

constant deceleration and neglect alr resistance and rolling resistance.

Problem $13\mathrm{.}124.$a $-$ Braking truck on a ramp

Determine the magnitude of the braking force.

The magnitude of the braking force is