Recent content by LoganNagol

  1. LoganNagol

    Physicists create 'negative mass'?

    <Moderator note: moved from separate thread> So I have a question about negative mass: does the equation "k=1/2mv^2 " still apply to negative mass? If it did, does that equal to negative energy? If it does not lead to negative energy, does that mean absolute value bars need to be added to the...
  2. LoganNagol

    E=1/2mv^2 Given E and change in velocity

    Thanks! I got the answer correct.
  3. LoganNagol

    E=1/2mv^2 Given E and change in velocity

    Homework Statement It takes 185 kJ of work to accelerate a car from 23.0 m/s to 28.0 m/s. What is the car’s mass?Homework Equations E=1/2mv^2 The Attempt at a Solution I get that I must put (2E) over V2 I am just not sure if I was allowed to put the change in velocity so it would look like...
  4. LoganNagol

    How can potential energy be negative?

    In my physics class I was told that potential energy can be negative because it relative, but i thought as long as something has room to fall it has a positive amount of potential energy. So how can potential energy be negative?
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