What is the mass of a ball that has a kinetic energy or 450 J what must it's mass be if it's traveling through the air at 30 m/s

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?