A rifle can shoot a 4.20-g bullet at a speed of 965 m/s. a)Find the KE of the bullet at this speed. b) What work is done on the bullet if it starts from rest?c) If thework is done over a distance of 0.75 m, what is the average force on the bullet?d) If the bullet comes to rest by pushing 1.5 cm into metal, what is the magnitude and direction of the average force the metal exerts?

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?