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Work, Energy, Power and Collision — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsWork, Energy, Power and Collision1 Mark
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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