sci_phy

Hooke's Law and Elasticity

Chapter summary, hard words and model exam answers for ICSE Class 10 Hindi.

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Physics · CBSE 10 · ICSE 10 · GCSE (AQA, Edexcel, OCR)

Double the force and the spring stretches twice as far. This is true only up to the elastic limit.

On a force-extension graph, k is the gradient of the straight line. A car spring has a huge k; a toy spring a tiny one.

The straight line bends past the limit of proportionality. Stretch far enough and the spring no longer returns to its natural length.

Let go and that energy is released - this is how a bow fires an arrow or a catapult launches a stone.

extension	the increase in length of a spring when a force pulls it, measured in metres
spring constant	the force per unit extension of a spring, symbol k, in N/m; a measure of stiffness
Hooke's law	extension is directly proportional to force up to the limit of proportionality
elastic limit	the point beyond which a material no longer returns to its original length
limit of proportionality	the point on the F-e graph where the straight line begins to curve
elastic deformation	a change of shape that reverses fully when the force is removed
plastic deformation	a permanent change of shape that remains after the force is removed
elastic potential energy	the energy stored in a stretched or compressed spring, E = ½ke²

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