IIT JEE , AIEEE Forum - Physics , Mechanics

karthik2007

1. MI of one sphere about center = 2/5mr²

MI of one sphere about tangent = 2/5mr²+mr² = 7/5mr²
Hence MI of two spheres about the same axis = 14/5mr²

2. For the block, the equation is

mg-T = ma

For the wheel:

TR = Ia/R
Use kinematics equations to make use of the given conditions and get your answer.

3. Conserve energy

4. Use mass = area x thickness, and go ahead with the normal MI calculations.

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