2. A particle moves along the x-axis according to the equation \( 5t = 3x^2 + 4x + 6 \), where x is the position in meter and t is the time in second. Find its speed when \( x = 1.0 \) m. _________(m/s)(A)2.0 (B)1.5 (C)1 (D)0.5 (E)0.1

9. In the right figure, \( R_1 = 5\Omega \), \( R_2 = 10\Omega \), \( R_3 = 15\Omega \), \( C_1 = 5\mu F \), \( C_2 = 10\mu F \), and the ideal battery has an emf \( \varepsilon = 20V \). In steady state, the total energy stored in the two capacitors is: (A)\( 2.78\times10^{-5} \) J (B)\( 1.12\times10^{-4} \) J (C)\( 2.22\times10^{-4} \) J (D)\( 2.50\times10^{-4} \) J (E)\( 4.72\times10^{-4} \) J

2. A particle moves along the x-axis according to the equation \( 5t = 3x^2 + 4x + 6 \), where x is the position in meter and t is the time in second. Find its speed when \( x = 1.0 \) m. _________(m/s)
(A)2.0
(B)1.5
(C)1
(D)0.5
(E)0.1

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