In 1990 walter arfeuille of belgium lifted a 281.5 kg object through a distance of 17.1 cm using only his teeth. a. how much work did arfeuille do on the object? b. what magnitude force did he exert on the object during the lift, assuming the force was constant?

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?