NEET Question Distribution for ME-05

Most Common Question Types

Type 1: Axis Theorem Application "Find I of a disc/sphere about a tangent/diameter." Strategy: Apply perpendicular axis theorem (for disc) then parallel axis theorem. Common result: $I_{disc,tangent,in-plane} = 5MR^2/4$; $I_{sphere,tangent} = 7MR^2/5$.

Type 2: Rolling Race "Which body reaches the bottom of the incline first?" Strategy: Compare $K^2/R^2$ values. Smallest wins. Answer: solid sphere.

Type 3: Angular Momentum Conservation (Skater-type) "Moment of inertia changes, find new $\omega$ or KE ratio." Strategy: $I_i\omega_i = I_f\omega_f$; $KE_f/KE_i = I_i/I_f$.

Type 4: Rolling Energy Problems "Find speed of a rolling body after descending height h." Strategy: $v = \sqrt{2gh/(1 + K^2/R^2)}$. Substitute the appropriate $K^2/R^2$.

Red Flags (Common Mistakes)

1. Using the perpendicular axis theorem for a sphere or cylinder — INVALID
2. Forgetting to add $Md^2$ when applying the parallel axis theorem
3. Thinking the rolling race result depends on mass or radius — it does NOT
4. Concluding that angular momentum conservation implies kinetic energy conservation — WRONG
5. Confusing $I_{diameter} = MR^2/4$ (disc) with $I_{axis} = MR^2/2$ (disc)