Question

Explain the concept of summer salt of a swimmer by conservation of angular momentum

Answer 1

Answer:

Somersault is a type of rotatory movement when both the legs are off the ground.

This can be explained by Conservation Of Angular Momentum :

Since , there is no external torque on the system , the angular momentum remains constant :

Let Angular Momentum be L , moment of Inertia be I and angular velocity be ω

$\therefore \: \tau \: = 0 \\ = > L = constant$

$= > I \omega = constant$

$= > I_{1} \omega_{1} = I_{2} \omega_{2}$

When the person is rotating, he pulls his hands and legs towards himself/herself.

This would increase the angular velocity and complete the somersault.