While teaching the topic 'Friction' to Class V students, a teacher gave a number of examples to explain that friction is also useful to us in many ways. Which one of the following examples was quoted by her incorrectly?
1
We are able to walk because of friction between our shoes and the ground
2
An object thrown vertically upwards always comes back to us due to friction
3
A vehicle stops on application of brakes
4
We are able to write due to friction between the tip of the pen and the paper