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Q.

A 20g particle moves in SHM with a frequency of 3 oscillations per second and amplitude of 5 cm. Through what total distance does the particle move during one oscillation? What is its average speed ?

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a

20 cm, 20cm/sec   

b

40 cm, 40cm/sec

c

20 cm, 60cm/sec

d

40 cm, 60cm/sec

answer is D.

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Detailed Solution

Total distance  S = 4A ;  s =  20cm

Average speed = \large = \,\frac{s}{t}\, = \,\frac{{20}}{T};\,\,But\,\,f\, = \,3osc/\sec

\large T\, = \,\frac{1}{3}\sec       Average speed  \large = \,\frac{{20}}{1} \times 3\, = \,60cm/\sec \,\,\,\,\,\,

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