To stretch a spring 5.00 cm from its unstretched length, 19.0J of work must be done.
1. What is the force constant of this spring?
k =? N/m
2. What magnitude force is needed to stretch the spring 5.00 cm from its unstretched length?
F= ? N
3. How much work must be done to compress this spring 4.00 cm from its
unstretched length?
W=?J
4. What force is needed to stretch it this distance?
F=? N
force constant
2012-10-19 7:31 am
回答 (1)
2012-10-19 4:21 pm
✔ 最佳答案
1. Let k be the force constanthence, (1/2)k(5/100)^2 = 19
k = 15200 N/m
2. Force F = 15200 x (5/100) N = 760 N
3. Work done = (1/2)x 15200 x (4/100)^2 J = 12.16 J
4. Force = 15200 x (4/100) N = 608 J
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