It takes 444 newton to acceleration an object 7.0 m/s^2. What force was applied to the object?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

What are the three ways that an object can accelerate

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?