2. As shown in Fig.2, one block of mass M=2.00 kg is 1.00 m above the top of a massless spring. The force constant of the spring is k=200 N/m. This block is released from rest onto a spring, which is then compressed vertically. What is the maximum compression length of the spring? (g=9.8 m/s^2) (A) 0.55 m (B) 0.45 m (C) 0.36 m (D) 0.10 m (E) None

2. As shown in Fig.2, one block of mass M=2.00 kg is 1.00 m above the top of a massless spring. The force constant of the spring is k=200 N/m. This block is released from rest onto a spring, which is then compressed vertically. What is the maximum compression length of the spring? ($g=9.8 m/s^{2}$)
(A) 0.55 m
(B) 0.45 m
(C) 0.36 m
(D) 0.10 m
(E) None

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B1 · 2026/10/08

#7555148

這題在考什麼觀念力學能守恆：當物體從...

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6. As shown in Fig.3, a block of density $\rho{B}$ floats in a fluid of density $\rho{w}$ with a submerged depth of h in static equilibrium. The block has height H and face area A. The fluid container is placed upon a scale. If the block is pushed downward by a force F (with its upper face remaining above the fluid surface), which statement correctly describes the change in the scale reading? (A) It increases more than F. (B) It equals to F. (C) It increases but smaller than F. (D) It equals to the buoyant force of the block. (E) It equals to 0. (Figure 3 shows a block floating in a fluid, with a force F pushing down on it. The fluid container is on a scale.)

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