Item 9 Part A A 9.0-cm-long spring is attached to the ceiling. When a 1.7 kg mas

Question

Item 9 Part A A 9.0-cm-long spring is attached to the ceiling. When a 1.7 kg mass is hung from it, the spring stretches to a length of 16 cm What is the spring constant k? Express your answer to two significant figures and include the appropriate units 1185 Submit My Answers Give Up Incorrect; Try Again; 29 attempts remaining Part B How long is the spring when a 3.0 kg mass is suspended from it? Express your answer to two significant figures and include the appropriate units. y'= 1 Value Units Submit My Answers Give Up

Explanation / Answer

Ans

(a) equation will be F=k(x2-x1) and F= mg

so mg=kx

k=mg/x = 1.7*9.81/(0.16-0.09) = 238.242 N.m

(b) now the mass is 3 kg

x=mg/k= 3*9.81/238.242= 0.1235 m = 12.35 cm

length of spring will be 9+12.35= 21.35 cm

  

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