A long spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm; its potential energy will be |
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a) |
U/5 |
b) |
U/25 |
c) |
5 U |
d) |
25 U |

A long spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm; its potential energy will be |
|||||||

a) |
U/5 |
b) |
U/25 |
c) |
5 U |
d) |
25 U |

1 Answer

127 votes

The potential energy of a stretched spring is Here, k=spring constant, x=elongation in spring. But given that, the elongation is 2 cm. So Or ...(i) If elongation is 10 cm then potential energy Or …(ii) On dividing Eq. (ii) by Eq. (i), We have Or |

127 votes

127