15. A rigid body (hollow/solid cylinder or sphere, with radius R and total mass M) rolls without slipping from rest at the top of an ineline with height h down an inclined rigid plane. Given the moment of inertia through the center of mass, where n is a number less or equal to 1. Find the speed of the center of mass vcy after reaching the bottom of the incline.(A) (B)(C) (D)

8. The unit of magnetic induction field B is denoted as [B]=[N]/[A.m] and the electric field is [E]=[V] /[m], where [N] is Newton, [A] Ampere [V] Volt, and [m] meter. The clectric field due to an infinite non-conducting plane with uniform surface charge densityσ is given by E=σ /2ε0, where ε0 is the electric constant. On the other hand, the magnetic induction inside an ideal solenoid with steady current I is given by B= μ0nl , where μ0 is the magnetic constant and n is the number of turns per unit length. By using these hints, the quantity has the dimension of (A)pressure (B) charge current (C) angular momentum (D) resistance.

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