You throw a 3.00-n rock vertically into the air from ground level. you observe that when it is 15.3 m above the ground, it is traveling at 25.3 m/s upward use the work-energy theorem to find the rock's speed just as it left the ground. express your answer with the appropriate units. ? use the work-energy theorem to find its maximum height. express your answer with the appropriate units. ?

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?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

Arrange the images in order to show how lake-effect snow occurs.