A Grade 11 Waves - Frequency-Movement Problem

[incognito301]

****A Grade 11 Waves --- Frequency-Movement Problem****

A 20g mass is picked up and moved from its rest position 20 cm. The mass has a frequency of 2.0 Hz.

How far does it move in 10s. (Show work)


I have no idea how to solve this. But if it helps I have learned these equations a day before my teacher gave me this Q to hand in tomorrow:

f = N / T
T = t / N
V = WaveLength / T
V = WaveLength * f


What I tried was to solve it like this:

f = N / T ----> 2 = N/10 -----> N = 20

So x = 20 * 10 cm = 200 cm = 2 m

Is it right? please answer ASAP. I have to hand this in tomorrow!

 

[member 553083]

Yes, your answer is correct. Since the frequency of the mass is 2.0 Hz, it means that it completes 2 complete oscillations or cycles in 10 seconds. Therefore, if it moves 20 cm in one cycle, then it would move 2 m in 10 seconds.