Physics 12

posted by .

"A pendulum consisting of an object of mass 1.3kg suspended from a string of length 1.9m is pulled aside so that the string makes an angle of 28 degrees with the vertical. At the instant the pendulum is released, what is the magnitude of the unbalanced force on the object?"

I can't get this question, and am getting really frustrated. I know Fg is 12.74N, and should egual F1y. I know the angle between F1 and the horizontal is 62 degrees. But now Ihave no idea what to do. Oh, wait; I know F1x=cos62? So now I'm stuck. Please help?

  • Physics 12 -

    Fg = (1.3kg)(9.8N/kg) = 12.74N
    Fg can be resolved into two foces, T along the extension of the string, and Fp, at right angles to it.
    Fp = (12.74N)(cos62)=________N, or
    Fp = (12.74N)(sin28) =________N

    The vector triangle I hope you drew, shows the weight, Fg resolved into two vectors, Fp, the unbalanced force perpendicular to the string, and T (string tension) which is along the extension of the string and cancelled out by the string resistance.

  • Physics 12 -

    down load

  • Physics 12 -

    6.78

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A pendulum consists of an object of mass m = 1.2 kg swinging on a massless string of length l = 259 cm. The object has a speed of 2.4 m/s when it passes through its lowest point. What is the greatest angle with the vertical that the …
  2. physics

    3. A 250-g is attached to a string 1.00 m long to make a pendulum. If the pendulum bob is pulled to the right, such that the string makes an angle of 150 with the vertical, what is the maximum potential energy
  3. physics

    3. A 250-g is attached to a string 1.00 m long to make a pendulum. If the pendulum bob is pulled to the right, such that the string makes an angle of 150 with the vertical, what is the maximum potential energy
  4. AP PHYSICS MECH.

    A simple pendulum, consists of an object suspended by a string. The object is assumed to be a particle. The string, with its top end fixed, has negligible mass and does not stretch. In the absence of air friction, the system oscillates …
  5. physics

    A simple pendulum is made from a bob of mass 0.04 kg suspended on a light string of length 1.4 m. Keeping the string taut, the pendulum is pulled to one tntil it has gained a heit of 0.1 m.calculate the total energy of the oscillation?
  6. physics

    A simple pendulum has a mass m and carries a charge q. The pendulum is suspended between the vertical plates of a capacitor of separation distance d. If the string of the pendulum makes an angle θ with the vertical, what is the …
  7. physics

    A simple pendulum has a mass m and carries a charge q. The pendulum is suspended between the vertical plates of a capacitor of separation distance d. If the string of the pendulum makes an angle θ with the vertical, what is the …
  8. physics

    A simple pendulum has a mass m and carries a charge q. The pendulum is suspended between the vertical plates of a capacitor of separation distance d. If the string of the pendulum makes an angle θ with the vertical, what is the …
  9. Physics

    Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. Given the proper push, this pendulum can swing in a circle at an angle q of 25.5 with respect to the vertical, maintaining …
  10. Physics

    Two pendulums are set up side by side. One pendulum P, consists of a 0.240 kg mass that is suspended on a string that is 65.0 cm long. The other pendulum, Q, has a 0.360 kg mass that is suspended on a string that is 39.0 cm long. The …

More Similar Questions