Which one of the following statements is true concerning an object executing sim

Question

Which one of the following statements is true concerning an object executing simple harmonic motion? Its velocity is never zero. Its acceleration is never zero. The velocity and acceleration arc simultaneously zero. Its velocity is zero when its acceleration is a maximum. Its maximum acceleration is equal to its maximum velocity. A rock is thrown into a swimming pool filled with water at uniform temperature. Which of the following statements concerning the buoyant force (after the rock is completely immersed in water) is true? The buoyant force on the rock is zero as it sinks. The buoyant force on the rock increases as it sinks. The buoyant force on the rock decreases as it sinks. the buoyant force on the rock is constant as it sinks. the buoyant force on the rock as it sinks is nonzero at first but becomes zero once the terminal velocity is reached. Fluid is flowing from left to right through a pipe (see the drawing ). Points A and B are at the same elevation, but the cross-sectional areas of the pipe arc different. Points B and C are at different elevations, but the cross-sectional areas arc the same. Rank the pressure at the three points, highest to lowest. A and B (a tie), C A and B (a tie) A, B, C C, B, A B, C, A

Explanation / Answer

( 1 ) (b) its acceleration never zero

( 2) (b) The buoyant force is constant as it sinks

(3) C , A and B ( tie)

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.