What is the change in the velocity modulus of a body moving in a circle with a speed of 5 m / s

What is the change in the velocity modulus of a body moving in a circle with a speed of 5 m / s when passing a quarter of a circle?

If you subtract the first from the final, then it is equal to zero because the linear speed, but if you expand into vectors, you get 25.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.