Summary of Caída Libre (MVCL) - Ejercicios Resueltos - Intro

00:00:00 - 00:25:00

The YouTube video "Caída Libre (MVCL) - Ejercicios Resueltos - Intro" explains the concept of vertical free fall, which is a type of motion where objects move only under the influence of gravity once they are released. The video clarifies that the acceleration due to gravity has an average value of 9.8 meters per second squared, which remains constant regardless of the object's size, shape, or mass. The instructor presents equations to relate the five variables of vertical free fall and demonstrates how to use them to solve problems. The video also includes a solved example problem and encourages viewers to subscribe for more exercises on vertical motion and free fall.

• 00:00:00 this section, the YouTube video explains the concept of vertical free fall, which is a type of vertical motion where objects move only under the influence of gravity once they are released. In this type of motion, objects fall with the same acceleration, regardless of their size, shape or mass, and this acceleration is due to the gravity of the earth with an average value of 9.8 meters per second squared. The video also clarifies that the experiment of free fall should be conducted in a vacuum, where there is no air resistance to affect the results. Furthermore, it demonstrates that the acceleration due to gravity indicates the change in velocity per unit time, with a value of 9.8 meters per second squared indicating that in one second, the velocity will change by 9.8 meters per second.
• 00:05:00 In this section, the video discusses three scenarios of objects in freefall. In the first case, an object is dropped from rest, and its velocity increases by 9.8 meters per second each second due to gravity. In the second case, an object is launched downward with an initial velocity, and its velocity increases by 9.8 meters per second each second. In the third case, an object is launched vertically upwards, and once it reaches its maximum height, its velocity becomes zero. After this, the object falls downwards with an increasing velocity of 9.8 meters per second every second due to gravity.
• 00:10:00 In this section, the instructor discusses the properties of a body that is launched vertically upwards and falls back to the starting point. These properties include the velocity being zero at the maximum height, the velocity of ascent being equal to the velocity of descent at the same level, and the time of ascent being equal to the time of descent between two levels. The instructor then introduces the characters of the "movie" for problems of vertical free fall, including displacement, time, initial and final velocity, and acceleration due to gravity. An example problem is also given to demonstrate how to identify these characters in a given situation.
• 00:15:00 In this section, we learn how to relate the five variables of vertical free fall: vertical displacement/height, time, initial velocity, final velocity, and acceleration due to gravity. We can use scalar equations to represent these variables as simple numbers with accompanying units of measurement. By utilizing these equations, we can solve problems that involve finding the values of these variables. The equations presented allow us to determine the velocity final, velocity initial, acceleration of gravity, height, and time, depending on the given values. The problem-solving process involves identifying the villain variable or the unknown in the equation to obtain a solution.
• 00:20:00 In this section, the video explains the problem of a pot falling from the roof of a building and the need to determine the time it takes to hit the ground. The initial velocity is assumed to be zero because the pot is simply dropped, and the acceleration due to gravity is given as 10 meters per second squared. The formula used to calculate the time is discussed, and the given values of displacement, initial velocity, and acceleration are placed into the equation. The final velocity is not needed for this problem, so it is marked with an "x".
• 00:25:00 In this section, the video presents a solved exercise in which the goal is to determine the time it takes for an object to fall from a height of 45 meters assuming a gravitational acceleration of 10 meters per second squared. By using the formula that multiplies the gravitational acceleration value by the squared time value and then divides the result by two, the video explains step by step how to manipulate the equation to isolate the time value, yielding a final result of 3 seconds. The video also reminds viewers to work with exact values in the following exercises and invites them to subscribe to the channel for more solved problems of vertical movement and free fall.