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.

Question

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. 
Answer will be in m/s.

Elena · Answer

m•v²/2=mgh=m•g•s•sinα v=sqrt(2• g•s•sinα)