Work Power and Energy 5 Question 8
10. A spring of force constant $k$ is cut into two pieces such that one piece is double the length of the other. Then, the long piece will have a force constant of
$(1999,2 M)$
(a) $(2 / 3) k$
(b) $(3 / 2) k$
(c) $3 k$
(d) $6 k$
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Answer:
Correct Answer: 10. (b)
Solution:
- $l _1=2 l _2 \Rightarrow l _1=\frac{2}{3} l$
Force constant $k \propto \frac{1}{\text { length of spring }}$
