A wheel (radius = 12 cm) is mounted on a frictionless, horizontal ...

[renzo156]

A wheel (radius = 12 cm) is mounted on a frictionless, horizontal axle that is perpendicular to the wheel and passes through the center of mass of the wheel. A light cord wrapped around the wheel supports a 0.40-kg object. If released from rest with the string taut, the object is observed to fall with a downward acceleration of 3.0 m/s2 . What is the rotational inertia (of the wheel) about the given axle?
 a. 0.023 kg/m2
  b. 0.013 kg/m2
  c. 0.020 kg/m2
  d. 0.016 kg/m2
  e. 0.035 kg/m2

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 kg/m2
  b. 0.020 kg/m2
  c. 0.016 kg/m2
  d. 0.022 kg/m2
  e. 0.032 kg/m2

[shayla]

Answer to Question 1

b

Answer to Question 2

c

[renzo156]

Both answers were spot on, thank you once again

[shayla]

Great! Please up vote