The length of an elastic spring is metres when a force of 4 N is applied, and metres when the 5 N force is applied. Then the length of the spring when the 9 N force is applied is |
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a) |
b) |
c) |
d) |

The length of an elastic spring is metres when a force of 4 N is applied, and metres when the 5 N force is applied. Then the length of the spring when the 9 N force is applied is |
|||||||

a) |
b) |
c) |
d) |

1 Answer

127 votes

From Hooke’s law, restoring force F is where is spring constant. When L is original length of spring, and the spring constant, then |

Also

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When tension is 9 N.

Length of spring

Length of spring

Length of spring

127 votes

127