A person is standing on a frictionless horizontal ground. How can he move by a certain distance on this ground?

Solution (By Examveda Team)

Imagine you're standing on a perfectly smooth, icy surface – that's what a frictionless surface is like. Friction is what helps your feet grip the ground when you walk or run. Without friction, your feet would just slide. Let's analyze each option: Option A: Sneezing
Sneezing involves internal forces within your body. These forces won't move you on a frictionless surface because there's no external force to push against. This option is incorrect.

Option B: Jumping
When you jump, you push down on the ground (action). The ground pushes back up on you (reaction), and this reaction force propels you upward even without friction. This is due to Newton's Third Law of Motion. On a frictionless surface, jumping causes you to move upward, but due to the lack of friction, you also move horizontally a little bit. This option is correct.

Option C: Running
Running relies on friction between your feet and the ground to propel you forward. Without friction, your feet would just slip. This option is incorrect.

Option D: Rolling
Similar to running, rolling needs friction to work. You wouldn't roll effectively on a frictionless surface. This option is incorrect.

Conclusion:
The only way to move on a frictionless surface is by using an action that creates an equal and opposite reaction, as described in Newton's Third Law. Jumping is the only option that does this. Therefore, the correct answer is Option B: Jumping.