Question

A certain coiled wire with uneven windings has the property that to stretch it an amount s from its relaxed length requires a force that is given by H=0s, so its behavior is different from a normal spring. You suspend this device vertically, and its unstretched length is 20.0 cm. You hang a mass of 19.0 grams from the device, and you observe that the length is now 22.4 cm. What is b? (Start your analysis from the Momentum Principle.) Submit Answer Tries 0/8 You hold the 19.0 gram mass and throw it downward, releasing it when the length of the spring-like device is 25.4 cm and the speed of the mass is 4.30 m/s. One millisecond later, what is the approximate change in the speed of the mass? Submit Answer Tries 0/8 At this same time, one millisecond after throwing, what is the approximate change in the stretch of the device? Submit Answer Tries 0/8 A Doct Diccuccion sond Goodback

Answer 1

Criven data, mass = 199 1 = 19 x 103 kg a hmaw that, Febs3 mg=bs3 b=mg (9X103) (9.90 (0.224-0.2013 -0.18639 0.000013824 b = 13483107 Nm3) → Friom noutons second law, ma s bs3_mg (19x103)(a) = (13483:07 N/m3)(0.2954 -0.207_(19 17 (191103) á = 2.123-0.1862 918) (19x17) a 11936 a=98.77 m/s² Foiom kinematic equation, Vf= Vi+at Vf-Vir at

= 98,77 m/s?x7x103 fit= 1 millisecond) = 0.0987 mis - we know that, S = Vit that? = 4.30X1X103 +5x98.77 x(1x103)2 = 0.0043 +0.000049385 -0.00434 = 4.34x10²m (or) IS 24.34 mmil