Recent content by chloechloe

  1. C

    Position & Force of Q2 & Q3 Charges

    If they attract they move towards each other, so regardless of which one is positive and which is negative, force will be directed to the right. right? I get confused because it is explained to us that convention is charge goes out of a positive <-----+-----> and into a negative...
  2. C

    Position & Force of Q2 & Q3 Charges

    If 2 is + and 3 is -, what is force on 2? If 3 is + and 2 is -, what is force on 2? I know opposites attract, but what does that mean for force on 2? thanks.
  3. C

    Position & Force of Q2 & Q3 Charges

    because I don't understand what the question is asking. to me, b and c are asking the same thing. B) right if the two charges have opposite signs. 2 could be + or - and 3 could be + or - C) left if the two charges have opposite signs. 2 could be + or - and 3 could be + or - if 2 is + and...
  4. C

    Position & Force of Q2 & Q3 Charges

    I had a question about this question, too. I guessed... a. true b. false - if 2 is positive and 3 is negative, the force on 2 from 3 is to the right (charge from positive goes out and is attracted to negative) vice versa if 2 is negative and 3 is positive. c. false d. true e. false
  5. C

    Rotational accel to linear accel

    Thank you. Makes sense now. I was getting stuck at combining things at the end. The missing alpha didn't help either.
  6. C

    Rotational accel to linear accel

    Homework Statement I do not understand how a was solved for. the picture is a sphere rolling down a hill. Asked to solve for a. Homework Equations solve for a, use alpha = a/r ma = mg sin theta - fs; T = fs*r = I*alpha = (2/5)mr^2; fs = (2/5)ma a = (5/7)g sin theta I can't see the...
  7. C

    Energy of translation and energy of rotation

    YAY! Thanks for confirming. I am struggling with physics.
  8. C

    Energy of translation and energy of rotation

    Homework Statement How would you go about figuring out the ratio of components (rotational and translational energy) of total kinetic energy? Homework Equations The Attempt at a Solution i started with KEtotal=KEr+KEtr. KEr=1/2Iw^2; KEtr=1/2mv^2 use I for a disk-I=1/2mr^2 I put...
  9. C

    What happens to angular velocity when there is no force of acceleration?

    I am trying to answer a question, but I don't really understand what is being asked. If you were to plot angular velocity against time and there was not force of acceleration explain what the curve would look like. I would guess a straight horizontal line since angular acceleration is the...