Recent content by Victorzaroni

  1. V

    Finding the ratio of masses in constant acceleration motion

    Homework Statement An engine provides a constant force F to a car of mass M that carries a box of mass m on the top of it. After traveling from rest with constant acceleration a1 for 20 seconds, the speed of the car becomes 40m/s and at that instant the box falls off the car. In the next 20...
  2. V

    What Is the Kinetic Energy of the Bigger Mass After an Explosion?

    Oh I think I understand why the answer is the answer. Dividing the small mass by the big mass gives you the ratio, and then multiplying this by the small pieces Kinetic Energy gives you the fraction of kinetic energy that the big piece has. I think. Now how do I put that in equation form to show...
  3. V

    What Is the Kinetic Energy of the Bigger Mass After an Explosion?

    Yes I figured that part out. So M-M1 is the mass of the other piece. I don't know how to factor this into an equation that relates the kinetic energy of the first piece.
  4. V

    Advanced Rotational Velocity Question

    how would I express the normal reaction force? I've got Fc=Fnet, so mac=mg+N. What is N? Is it mgsinø, mgcosø? What is it?
  5. V

    Advanced Rotational Velocity Question

    Homework Statement A particle of mass m rotates with a uniform speed on the inside of a bowl's parabolic frictionless surface in a horizontal circle of radius R=0.4 meters as shown below. At the position of the particle the surface makes an angle θ=20 degrees with the vertical. The angular...
  6. V

    What Is the Kinetic Energy of the Bigger Mass After an Explosion?

    Homework Statement An explosive of mass M is initially at rest. It then explodes into two pieces and travels along a straight line. The small piece has mass M1, speed V1, and kinetic energy K1=(1/2)M1V12. The kinetic energy of the bigger mass would be in terms of K1 would be: Homework...
  7. V

    Advanced Forces Question, Forces Inside a Moving Car

    Homework Statement A mass m is suspended by a light string from the ceiling of a moving car of mass M which is accelerating in the horizontal direction. The string makes an angle θ with the vertical as shown below. The acceleration of the car is: (A) mg/M (B) gsinø (C) g/tanø (D) mg/(m+M) (E)...
  8. V

    Inelastic Collision and Rotational Inertia

    Well that's what I did and it was wrong. You said the right side of the equation was wrong because of the (m+m). I get now why we can equate things because of their angular momentum, but I am missing a piece and I don't what it is
  9. V

    Kinetic Energy Ratio/Rotational Equilibrium

    The kinetic energy of the clay equals the rotational kinetic energy of the system?
  10. V

    Kinetic Energy Ratio/Rotational Equilibrium

    So how do i use a conservation law?
  11. V

    Inelastic Collision and Rotational Inertia

    But the other mass is sliding? So how does it have angular momentum?
  12. V

    Inelastic Collision and Rotational Inertia

    Oh okay yea I didn't think that that made much sense. So I am just equating: Lmsqrt(2gh)=(1/3)mL^2
  13. V

    Kinetic Energy Ratio/Rotational Equilibrium

    I'm not using conservation, KEf/KEi is what the question is asking for and the other stuff is what you've been saying. lol
  14. V

    Center of Mass/Moment of Inertia Question

    I got it. Thanks!
  15. V

    Center of Mass/Moment of Inertia Question

    I have the distances to the CM from M1. I need to do the same thing for M2 then. But where do I go from there? Once I have these two distances, do I plug them both in for d separately and add?