Question #1bd60

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Answer 1 · 2015-04-03T16:51:03

(a) $f = 3 s^{- 1}$ $f=3s^(-1)$

(b) $T = \frac{1}{3} s$ $T=1/3s$

(c) $v = 6 m/s$ $v=6"m/s"$

Speed = frequency x wavelength

$v = f λ$ $v=flambda$

If it vibrates 3 times per sec then $f = 3 s^{- 1}$ $f=3s^(-1)$

The period $T$ $T$ is the time taken for 1 complete vibration and is equal to $\frac{1}{f}$ $1/f$ .

So $T = \frac{1}{3} = 0.33 s$ $T=1/3= 0.33s$

and:

$v = 3 \times 2 = 6 m/s$ $v=3xx2 = 6"m/s"$