Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 slater?

- 0.153 m

Explanation:

mass, m = 450 g = 0.45 kg

length of the spring, l = 35 cm = 0.35 m

additional stretch, A = 18 cm = 0.18 m

Let ω  be the angular frequency and A be the amplitude and k be the spring constant.

F = mg = k l

k = 12.6 N/m

ω  = 5.29 rad/s

Use the equation of oscillations

x = A Cosωt

x = 0.18 Cos 5.29 t

Put, t = 84.4 s

x = 0.18 Cos (52.9 x 84.4)

x = - 0.153 m

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