MCQ
A spring when stretched by $2 \mathrm{~mm}$ its potential energy becomes $4 \mathrm{~J}$. If it is stretched by $10 \mathrm{~mm}$, its potential energy is equal to
- A$4 J$
- B$54 J$
- C$415 \mathrm{~J}$
- ✓None
✓
Answer
Correct option: D.
None
(d) $U=\frac{1}{2} k x^2$ if $x$ becomes 5 times then energywillbecome25timesi.e$4\times 25=100 \mathrm{~J}$
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