Question

what happens to the spring Sofa Sofa when we sit on it

Answer 1

When we sit on it, the force exerted by weight compresses the spring and transforms its shape. This proves that the force applied from the outside can change the shape of the object.

Hope it helps you :)

Answer 2

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The shape and size of the spring changes, the force due to sitting on sofa changes the shape and size of the spring.