( 48 025 ) 3.5 0) 34 d 2.5 ms 10 A 8.20 g ojet atached so a at e spring with spr

Question

( 48 025 ) 3.5 0) 34 d 2.5 ms 10 A 8.20 g ojet atached so a at e spring with spring constant A- 10 N/m, is moving on a n simple harmonic motion of amplitude of 0.080 m. What is whens ins digplacement is 0 040 m7 fint: Use conservation of energy d. 24.5 cs of a 0.64-4g mass ng simple harmonic motion is given by " 11. The position of a to 1° (O 160 m) cos (m/16). what is its periodoroscillation?, (nU/16). What is its period of oscillation? a. 100 s b. 32 c, 16 s d. 8.0 has a period of 2.0 s. What is the pendulum length? (-9.8 m/s ? (g 9.8 m/s?) 12. A simple a. 0.36 m b. 0.78 m c. 0.99 m d. 2.4 m 13. 4 2 0m long piano sring of mss 0 g is under a tension of 338 N. Find the speed with which a wave travels on this string. a. 130 m/s b. 260 m/s c. 520 m/s d. 1 040 m/s 14. What is the intensity level of a sound with intensity of 5.0 x 10-10 W/m"? (1,-10"12 W/) a. 74 dB b.54 dB c. 2.7 dB d. 27 dB

Explanation / Answer

8)

wavelength = speed of wave * time

wavelength = 12 m/s * 0.25 s

wavelength = 3 m

option c)

9)m = 0.20 Kg

k = 10 N/m

x = 0.050 m

let the acceleration is a

m * a = k * x

0.20 * a = 10 * 0.050

a = 2.5 m/s^2 option d)

10)

m = 0.20 Kg

k = 10 N/m

Using conservation of energy

0.5 * m * v^2 + 0.5 * k * x^2 = 0.5 * k * A^2

0.20 * v^2 + 10 * 0.040^2 = 10 * 0.80^2

solving for v

v = 49 m/s = 49 cm/s

option c. 49 cm/s

11)

here, w = pi/16 rad/s

period of oscillation = 2pi/w

period of oscillation = 2pi/(pi/16)

period of oscillation = 32 s

11)

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