Asemitrailer 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 15.0° above the horizontal. the semitrailer coasts to a stop after traveling 159 m along the ramp. what was the truck's initial speed? neglect air resistance and friction

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?