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Three identical solid spheres move down three
P inclines A, B and C-all of the same dimensions.

W \( A \) is without friction, the friction between \( B \) and a sphere is sufficient to cause rolling without slipping, the friction between \( \mathrm{C} \) and a sphere causes rolling with slipping. The kinetic energies of A, B, C at the bottom of the inclines are
\( -\mathrm{E}_{\mathrm{A}}, \mathrm{E}_{\mathrm{B}}, \mathrm{E}_{\mathrm{C}} \).
(1) \( E_{A}=E_{B}=E_{C} \)
(2) \( E_{A}=E_{B}E_{C} \)
(3) \( E_{A}E_{B}E_{C} \)
(4) \( E_{A}E_{B}=E_{C} \)
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