USE THE FOLLOWING DESCRIPTION TO ANSWER QUESTIONS 1, 2 AND 3 The function x = (2

Question

USE THE FOLLOWING DESCRIPTION TO ANSWER QUESTIONS 1, 2 AND 3 The function x = (2m) cos {(6.285 nd)} describes the simple harmonic motion of a 0.317 kg mass attached to a spring. What is the frequency of the motion in Hz? What is maximum acceleration of the mass? What is the spring constant of the spring? USE THE FOLLOWING DESCRIPTION TO ANSSWER QUESTIONS 4 AND 5 A uniform solid rod is only supported by centrally placed pivot is shown below. The rod has a length of 4 m and mass of 0.8 kg. A 10 N force is suddenly applied to one end as shown below. What is the torque on the rod about the pivot point?

Explanation / Answer

1) f = 6.28/2*3.14 = 1 hz    option b

2) a = w^2*A = 6.28*6.28*2 = 78.9 m/s^2

3) K = m*w^2 = 0.317*6.28*6.28 = 12.5 N/m

4) torque = F*(L/2)*cos60 = 10*cos60*2 = 10 Nm

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