When the mass descends the kinetic energy of the pulley changes-by J. 0 11 166 4

Question

When the mass descends the kinetic energy of the pulley changes-by J. 0 11 166 425 490 A harmonic oscillator is made of a 0.5 kg mass, attached to a spring of force constant 200 N/m. The mass moves on a level, frictionless surface. The X-coordinate of the mass is measured from the relaxed length of the spring and is positive for a stretch. The spring is initially compressed 0.1 m. The frequency of vibration of this oscillator H_z. J.18 63.7 45.0 20.0 11.5 The amplitude of the oscillation will be n. 20 2 0.1 0.01 3.18 When the mass passes through its equilibrium position, its speed wil be m/s. 0 200 400 100 40 When the mass is at its initial position, its acceleration is m/s^2. 0 200 100 40 When the mass passes through the unstretched position of the spring, it. acceleration is m/s^2. 0 200 400 100 40

Explanation / Answer

m =0.5 kg, k =200 N/m

21) w = 2pi*f = (k/m)^0.5

f = (1/6.28)(200/0.5)^0.5 =3.185 Hz

correct option is (A)

22) A =0.1 m

correct option is (c)

23) v = Aw =0.1*2*3.14*3.185 =2 m/s

correct option is (B)

24) a =0

correct option is (A)

25) a =Aw^2 = 0.1*(2*3.14*3.185)^2 =40 m/s^2

correct option is (E)

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