# Physics

A semitrailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway-truck ramp that is inclined at an angle of 10.0° above the horizontal. The semitrailer coasts to a stop after traveling 137 m along the ramp. What was the truck's initial speed? Neglect air resistance and friction.

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2. 👎 0
3. 👁 139
1. m•v²/2=mgh=m•g•s•sinα
v=sqrt(2• g•s•sinα)

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2. 👎 0
posted by Elena

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