Human Sperm is breaking Newton’s Third Law of Motion : Read How

One of the most well-known physics laws is Newton’s third rule of motion, which states that “for every action, there is an equal and opposite reaction.” However, this could not be the case for biological swimmers like sperm.

Human sperm are the newest lawbreakers; scientists have discovered that they can swim by morphing their bodies in a way that prevents them from being detected by their surroundings. According to their findings from a recent study, this violates Newton’s third rule of motion.

Kamikaze Sperm: Fighting Off Rivals?

They looked at data on Chlamydomonas algae and human sperm cells to find non-reciprocal mechanical interactions that violate Newton’s third law in order to come to this result. These interactions are known as “odd elasticity.”

The flagella, which resemble hairs, are what enable Chlamydomonas and sperm cells to move. These stick out of the cell like a tail. These protrude from the cell and facilitate its movement by altering their shape in reaction to the fluid around them. Since they don’t create an equal and opposite response from their surroundings, they act non-reciprocal, which is against Newton’s third law.

The cell’s ability to move is not entirely explained by the flagellum’s flexibility. This is where the idea of peculiar flexibility is useful. The cells’ odd flexibility essentially enables them to move their flagella without using a lot of energy in their surroundings, which would normally prevent them from moving.

An odd elasticity score, also known as an odd elastic modulus, boosts a cell’s capacity to wave without experiencing a large loss of energy. This enhances the cell’s ability to advance in a way that defies the laws of physics.

There are probably more rule-breaker cells out there that are just waiting to be found. Sperm and algae are not the only cells with flagellums.

According to the research team, it might be highly beneficial to comprehend and categorize other cells or creatures that exhibit non-reciprocal movement, as they told New Scientist Magazine.

One of the study’s authors, Kenta Ishimoto of Kyoto University in Japan, claims that their method may be useful in the creation of tiny elastic robots that are able to defy Newton’s third rule.

Leave a comment