physics

posted by .

Suppose that you measured the moment of inertia of the system as I = 5.05 kg-m2. Assume the diameter of the pulley around which you wrap the string is d = 2.5 cm.

a) suppose the system is initially spinning at angular speed ωo = 2.05 rad/s. After you drop a cube of mass 786 g on it, the system rotates at ωf = 1.79 rad/s. Find:
- the moment of inertia of the cube: kg-m2
- the length of one side of the cube: cm

i found moment of inertia but could not find length

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A bicycle wheel is mounted on a fixed, frictionless axle. A massless string is wound around the wheel's rim, and a constant horizontal force, F, starts pulling the string from the top of the wheel starting at time t = 0 when the wheel …
  2. physics

    A block (mass = 2.9 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.2 x 10-3 kg·m2), as the figure shows. Initially the pulley is prevented from rotating and the block is stationary. Then, …
  3. physics

    Four objects are held in position at the corners of a rectangle by light rods . m1 2.90(kg) m2 1.90(kg) m3 4.50(kg) m41.90 (kg) (a) Find the moment of inertia of the system about the x-axis. Answer in kg · m2 (b) Find the moment of …
  4. physics

    A 16 lb block rests on a horizontal frictionless surface. A cord attached to the block, running horizontally, passes over a pulley whose diameter is 1 in, to a hanging block weighing 16 lb. The system is released from rest, and the …
  5. Physics

    A light string is attached to both a hanging mass m1 = 5 kg and to a pulley of mass m2= 6 kg, and radius R = 0.75 m. If the pulley is a solid disc rotating about its center with a moment of inertia of I = 0.5*m2R2, and the string does …
  6. physics

    A 16lb block rests on a horizontal frictionless surface. A cord attached to the block, running horizontally, passes over a pulley whose diameter is 6in, to a hanging block weighing 16lb. The system is released from rest, and the blocks …
  7. Physics

    There is a block of mass 1 on a frictionless surface attached to a string. The string goes over a frictionless pulley. The pulley is a hoop with a rotational inertia of I=MR^2. The other end of the string is attached to a hanging block …
  8. PHYSICS, help!

    A 5 kg block rests on a frictionless horizontal surface. A cord attached to the block passes over the pulley whose diameter is 0.120 m to the hanging block of mass 5 kg. The system is released from rest and the blocks are observed …
  9. PHYSICS

    A 5 kg block rests on a frictionless horizontal surface. A cord attached to the block passes over the pulley whose diameter is 0.120 m to the hanging block of mass 5 kg. The system is released from rest and the blocks are observed …
  10. physics

    A rotating platform is on a table and an object is on the platform. The platform has a diameter of 30.0cm and it has a string wrapped around it. The string is threaded over a pulley ( which is right next to the platform and attached …

More Similar Questions