作死物理小课堂wave

开课啦 | 作死物理小课堂wave

今天我们来讲讲物理中的wave问题

适合A-Level,IB的伙伴们学习

（不说废话，直击主题）

一起来看看物理沈老师给我们总结的内容

看完这期的资料大家理解了嘛？

如果不清楚的话试着做做下面的这几道题目，测测自己的水平吧

1. What is the wavelength of a 5 Hz wave that travels with a speed of 10 m/s?

(A) 0.25m

(B) O.5m

(C) 1m

(D) 2m

(E) 50m

2. A rope of length 5 m is stretched to a tension of 80 N. If its mass is 1 kg, at what speed would a 10 Hz transverse wave travel down die string?

(A) 2 m/s

(B) 5 m/s

(C) 20 m/s

(D) 50 m/s

(E) 200m/s

3. A transverse wave on a long horizontal rope with a wavelength of 8 m travels at 2 m/s. At t = 0, a particular point on the rope has a vertical displacement of +A, where A is the amplitude of the wave. At what time will the vertical displacement of this same point on the rope be -A?

(A) t = 1/8 s

(B) t = 1/4 s

(C) t = 1/2s

(D) t = 2 s

(E) t = 4s

4. What is the wavelength of a wave with period 2s and speed 2 cm/s?

(A) 0.25 cm

(B) 0.5 cm

 (C) 1 cm

 (D) 2 cm

 (E) 4 cm

5. A string, fixed at both ends, supports a standing wave with a total of 4 nodes. If the length of the string is 6 m, what is the wavelength of the wave?

 (A) 0.67 m

 (B) 1.2 m

 (C) 1.5 m

 (D) 3 m

 (E) 4 m