第六章测试1.Oscillation can occur only when there is a restoring force tending to return the system to equilibrium. （ ）
A:错 B:对
答案:B
2.In simple harmonic motion the period and frequency do not depend on the amplitude. （ ）
A:对 B:错 3.Set T as the period, as the frequency and as the angular frequency. Which of the following expression is incorrect （ ）?
A: B: C: D: 4.A block attached to a hanging ideal spring oscillates up and down with a period of 10 s on earth. If you take the block and spring to Mars, where the acceleration due to gravity is only about 40% as large as on earth, what will be the new period of oscillation? （ ）
A:less than 10 s. B:not enough information given to decide. C:more than 10 s; D:10 s; 5.In simple harmonic motion, the acceleration a is generally expressed as （ ）.
A: B: C: D:
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