The spring constant is 2110 N/m 74 kg 95 N 9 kg 2210 Figure 1 Figure 2 NOTES IMA

Question

The spring constant is 2110 N/m

74 kg 95 N 9 kg 2210 Figure 1 Figure 2 NOTES IMAGES DISCUSS UNITS STATS HELP PartDescription Answer Chk History Determine the acceleration of the 9 kg block shown in Figure 1. The coefficient of static friction is 0.6 and the coefficient of kinetic friction is 0.4. (m/s2) A: 6.635 C: 6.632 # tries Hints: 2,0 The 74 kg package in Figure 2 is initially suspended just above the undeformed position of the spring. The package is pushed down, displacing the spring 2.3 m, and then released. Determine the maximum height above the release point that the package goes. The package is not connected to the spring. (m) 9.2 pts. 929011 .. Tr 2% try penalty! # tries Hints: 1,0 9.84

Explanation / Answer

B. Applying work - energy theorem,

Work done by gravity + work done by spring force = change in KE

(-74 x 9.8 x h) + (2210 x 2.3^2 / 2) = 0 - 0

h = 8.06 m .......Ans

{ if spring constant is 2110 N/m then h = 7.70 m }

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