General Knowledge - Physics - Discussion

When we drag a drum, it has more friction on the surface, while when we roll a drum it has less friction. Hence rolling a drum causes less friction and easy to transport.

Similarly walking on sand causes more resistance ( i.e 1 more friction) on foot, causing difficult to walk. While on concrete there is lesser resistance (i.e 5 less friction compared to that of sand and foot), resulting in an easier way to walk.

In addition as explained earlier by Prashant - When your feet slip, that means there is less frictional force between your feet and the path you walk.

When your feet stick, that means there is a more frictional force between your feet and the path.

So it is difficult to walk if there is a more frictional force and also less frictional force.

Hence I seems option C is correct.

This phenomena proves that action force is more and reaction force is less. Less friction is negligible but more friction is cause for unequal action and reaction which challenges Newton's third law of motion. There are many evidences in our universe which has unequal action and reaction.

I have proved these things in practical, mathematical way and logical way with a new law. The research paper has been submitted to APS (American Physical Society) journal.

When your feet slip, that means there is less frictional force between your feet and the path you walk.
When your feet stick, that means there is more frictional force between your feet and the path.
So it is difficult to walk if there is more frictional force and also less frictional force.

@Koushik.

Who told you won't fall on sand?

The answer is sand are dust particles and can blow away by wind and road thick and it so cannot blow away by the wind so when the wind blows the sand flies away and we will loose grip but on road, the concrete stays strong and we can walk easily.

There is also friction in the concrete road that's the reason we are able to walk. But in the sandy road, we usually press our feet hard on it to walk since we don't actually get a good grip.

This is because the friction between the sand and feet is less.

Hope I made it clear!

The reaction of a hard floor on the feet is much more than that applied by the sand on the feet. A part of the action by the feet on the sand is dissipated within the sand particles due to the lower friction within the particles as compared to the layers of hard surface.

Yeah, option B is right because friction helps us to walk and where there is a less friction like on the sand, it is difficult to walk and therefore on the rough surfaces line get road there is more friction which helps us to walk easily.

I think option B is correct because when friction is less than one will feel quite hard to walk like in a slippery way the friction will be less between our feet and path which may make us fall down.

So option B is correct guys.

If friction is not it all then we can't walk. And if there were more friction then also we can't walk.

Friction is not the point here, here the piont is lithology of sand. Car d'nt move easily in sand due to same problem.

It is all about of friction. There is less friction between sand and feet by that the more time is needed to walk on sand so by that the magnitude of force get decrease so it difficult to walk on sand.