A body starts to slide over horizontal surface with initial velocity of 0.5m/s. due to friction it's velocity decreases at rate of 0.05m/s2.How much time will it take to stop the body

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

When an object is heated it contracts. a. true b. false

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?