Question

What happens to the springs of a sofa when we sit on it

Answer 1

A force can change the shape and size of an object

1)If we take a spring and pull it at both the ends with our hands ,then the shape and size of the spring changes, the force of our hands changes the shape and size of the spring.

2)The shape of dough changes on pressing with rolling pin to make chapatis.When we press the dough with a rolling pin, we apply force.

3)The shape of kneaded wet clay changes when a Potter converts it into pots of different shapes and sizes because the Potter applies force on the kneaded wet clay.

4)The shape of toothpaste tube changes when we squeeze it because we apply force while squeezing it.

5)When we hammer a piece of aluminium metal its shape changes and aluminium sheet is formed .

6)When we sit on a sofa with Springs, then the springs of the sofa get compressed and their shape and size changes. Because our weight applies a force on the spring and compress them. The shape and size of a balloon changes when it is filled with air because weight of air exerts a force on the walls of balloon from inside.



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.