A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of4.0 cm. If a timer is started when its displacement is a maximum (hence x = 4 cm when t = 0), what isthe acceleration magnitude when t = 3 s?
未知类型：{'options': ['', '', '', '', ''], 'type': 102}
未知类型：{'options': ['', '', '', '', ''], 'type': 102}
举一反三
- 0Hz and an amplitude of8.0cm.<br/>If a timer is started when its displacement is a maximum (hence x=8cm<br/>when t=0),<br/>what isthe<br/>displacement of the mass when t=3.7s? A: zero B: 0.025<br/>m C: 0.036<br/>m D: 0.080<br/>m E: 0.095<br/>m
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- 一质点在x轴上作简谐振动，振幅A = 4 cm，周期T = 2 s，其平衡位置取作坐标原点。若t = 0时刻质点第一次通过x = -2 cm处，且向x轴负方向运动，则质点第二次通过x = -2 cm处的时刻为 未知类型：{'options': ['1', ' [img=11x33]17da3e8f790cd5e.jpg[/img]', ' [img=11x33]17da3fa7159a83d.jpg[/img]', ' 2'], 'type': 102}
- For a certain ground motion, if its peak ground motion acceleration is 10.0, then Sa(0), the value of its response spectrum at T =0 is? A: 1.0 B: 10.0 C: 0.0 D: 2.25
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