i still don't understand what numbers I am using there is no numbers given...? kinetic energy is increasing? I am sorry i feel stupid this is my first physics course though and my professor does not explian things well at all...
All helicopters have two rotors. Some have both rotors on vertical axes but rotating in opposite directions, and the rest have one rotor on a horizontal axis perpendicular to the helicopter body at the tail. Why is a single rotor never used? :frown:
Homework Statement
the momentum of an object (originally with a non zero momentum) is doubled by doubling the speed. What happens to the kinetic energy? Justify your answer you should get a numerical answer.
Homework Equations
The Attempt at a Solution
well i know that momentum...