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This one is hard

  1. Apr 22, 2004 #1
    Four particles, each of mass 0.200kg, are placed at the vertices of a square with sides of length 0.500m. The particles are connected by rods of negligible masses. This rigid body can rotate in a vertical plane about a horizontal axis that passes through one of the particles (A for example, as shown in figure attached.)
    (a) What is the rotational inertia I of the body about axis A?
    (b) What is the net torque Tnet about axis A (due to the gravitational forces), when the rod AB is horizontal?
    (c) What is the angular acceleration a of the body at the instant rod AB is horizontal?

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  2. jcsd
  3. Apr 23, 2004 #2


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    Others have said it in your other threads, but you must show what you've tried, Clutch.

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