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

examrobotsa's picture
Q: 16 (CDS-II/2017)
A person is standing on a frictionless horizontal ground. How can he move by a certain distance on this ground?

question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,9,11,9,3,1,7

keywords: 

{'frictionless horizontal ground': [0, 0, 0, 1], 'ground': [2, 1, 4, 17], 'certain distance': [0, 0, 1, 1], 'person': [3, 1, 18, 13]}

The correct answer is option 1 - By sneezing.

Option 1: By sneezing

If a person sneezes, their body exerts a force in one direction, creating a reaction force in the opposite direction, as described by Newton`s third law of motion. This reaction force can cause a person to move in the direction opposite to the force exerted during the sneeze. Therefore, by sneezing, a person can move by a certain distance on the frictionless ground.

Option 2: By jumping

Jumping involves using the legs to exert a force against the ground and propel oneself into the air. While jumping can cause vertical movement, it does not necessarily result in horizontal movement on a frictionless ground.

Option 3: By running

Running involves a combination of pushing against the ground with the legs and propelling the body forward through continuous leg movement. While running does result in horizontal movement, it requires friction between the feet and the ground to push off and propel forward. Therefore, running would not be possible on a frictionless ground.

Option 4: By rolling

Rolling involves moving by rotating on an axis, typically with the help of wheels or another rounded surface. However, rolling also requires some form of friction to