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444_Physics ProblemsTechnical Physics

# 444_Physics ProblemsTechnical Physics - 446 P15.16...

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446 Oscillatory Motion P15.16 m = 200 g, T = 0 250 . s, E = 2 00 . J ; ω π π = = = 2 2 0 250 25 1 T . . rad s (a) k m = = = ω 2 2 0 200 126 . kg 25.1 rad s N m b g (b) E kA A E k = = = = 2 2 2 2 2 00 126 0 178 . . a f m P15.17 Choose the car with its shock-absorbing bumper as the system; by conservation of energy, 1 2 1 2 2 2 mv kx = : v x k m = = × × = 3 16 10 5 00 10 10 2 23 2 6 3 . . . m m s e j P15.18 (a) E kA = = × = 2 2 2 2 250 3 50 10 2 0 153 N m m J . . e j (b) v A max = ω where ω = = = k m 250 0 500 22 4 1 . . s v max . = 0 784 m s (c) a A max . . . = = × = ω 2 2 1 2 3 50 10 22 4 17 5 m s m s 2 e j P15.19 (a) E kA = = × = 1 2 1 2 35 0 4 00 10 28 0 2 2 2 . . . N m m mJ b g e j (b) v A x k m A x = = ω 2 2 2 2 . v = × × × = 35 0 50 0 10 4 00 10 1 00 10 1 02 3 2 2 2 2 . . . . . e j e j m s (c) 1 2 1 2 1 2 1 2 35 0 4 00 10 3 00 10 12 2 2 2 2 2 2 2 2 mv kA kx = = × × L N M O Q P = . . . . a f e j e j mJ (d) 1 2 1 2 15 8 2 2 kx E mv = = . mJ P15.20 (a) k F x
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