An automobile having a mass of 941 kg is driven into a brick wall in a safety test. the bumper behaves like a spring of constant 2.37 × 106 n/m and compresses 1.61 cm as the car is brought to rest what was the speed of the car before impact, assuming no energy is lost during impact with the wall? answer in units of

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?