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Q.

A simple harmonic motion is given by y=5(sin3πt+3cos3πt) What is the amplitude of motion if y is in cm :

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a

100 cm

b

5 m

c

200 cm

d

10 cm

answer is D.

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Detailed Solution

ϕ=90∘soA=52+(53)2=5×2=10 cm
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