You throw a Frisbee of mass m and radius r so that it is spinning ...

[robinn137]

You throw a Frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the Frisbee. Ignoring air resistance, the torque exerted about its center of mass by gravity is
 a. 0.
  b. mgr.
  c. 2mgr.
  d. a function of the angular velocity.
  e. small at first, then increasing as the Frisbee loses the torque given it by your hand.

Question 2

Three particles, each of which has a mass of 80 g, are positioned at the vertices of an equilateral triangle with sides of length 60 cm. The particles are connected by rods of negligible mass. What is the moment of inertia of this rigid body about an axis that is parallel to one side of the triangle and passes through the respective midpoints of the other two sides?
 a. 0.018 kgm2
  b. 0.020 kgm2
  c. 0.016 kgm2
  d. 0.022 kgm2
  e. 0.032 kgm2

[ky860224]

Answer to Question 1

A

Answer to Question 2

C