Try to whirl a stone tied to a string horizontally above your head like the picture given below ) Then observe what happen if you release the object . How does it travel after release ?

Kinematics studies the movement of the body, which is a vector magnitude for which stone in a horizontal circular motion must be subjected to an acceleration that changes the direction of the speed even when its magnitude is constant, this acceleration is called centripetal.

a = v / r²

Where a is the acceleration, v the speed anf r the radius of circle

Newton's second law states that force is proportional to the mass of the body and its acceleration

F = m a

Where the bold indicate vectors, F is the force , m tha mass and a the acceleration.

Using these two expressions we see that the stone is subjected to a force directed towards the center of the circle. When this force becomes zero (breaks the rope) there is nothing to change the direction of the velocity at the point of rupture and the stone must follow with this velocity tangential to the point of rupture of the rope.

This is expressed in Newton's first law, which says:

The sum of the external forces of a body are zero, it must continue at rest or with constant speed.

In conclusion, we use the Newton's second law and kinematics when the rope breaks the body is nine with constant velocity and with a direction tangential to the trajectory at the point.

Learn more about Newton's first law here:

https://brainly.com/question/974124