Introduction to Free Fall

Free fall is an object that falls under the influence of gravity. It is said that an object that receives only gravity is in a free fall state. Free fall objects have two important motion characteristics.

All free falling objects (on the earth) will accelerate downward at a speed of 8 m / s / s (usually about 10 m / s / s in the envelope calculation).

Since the free falling object is accelerated downward at a speed of 8 m / s / s, the trajectory of the automatic transmission belt or the point diagram of its movement represents its acceleration. The dot plot on the right side shows the acceleration of free falling objects. The position of the object is displayed at regular time intervals (for example, every 0.1 seconds). The fact that the distance traveled by objects at each time interval increases is a clear sign that accelerates as the ball tilts downward. When you recall the previous lesson and the object moves downward and accelerates, that acceleration falls.

Acceleration of natural fall can be seen frequently in physical classroom through popular strobe light demonstration. The room became dark, and the kettle filled with water was connected to the dropper via the tube. The dropper drips off and the droplets where the flash falls are irradiated at a constant rate (eg once every 0.2 seconds). Instead of seeing the free flow of water from the dropper, you can see that it drips continuously several times as the separation distance increases. The drop pattern is similar to the dot plot on the right figure

Measurement of free fall acceleration Introduction Galileo Galilei (1564-1642) got the concept of correct acceleration of free fall for the first time and when all the resistance of the medium is completely eliminated, all the materials fall at the same speed. Today, this applies to all objects that can fall freely near the surface of the earth. The purpose of this experiment is to verify that Galileo claimed that the acceleration is constant. In addition, the magnitude of the acceleration is calculated

One of the main achievements of Galileo physics is the explanation of free fall. According to the free fall rule discovered by Galileo, all the objects on the surface of the Earth are uniformly accelerated and the acceleration of all objects is constant. Galileo did not ask where the acceleration of falling objects came from. The falling body obviously violates the law of conservation of momentum. According to Descartes, the movement of the falling body has to be accelerated by something, the body must grow momentum somewhere. But for Descartes, the only interaction mechanism is contact interaction (ie push or pull). The additional amount of motion given to the falling body must be moving (there must be some movement to be able to transmit the motion) and it must constantly be in contact with the falling body.

As learned in the previous unit, free fall is a special type of movement where the only force acting on the object is gravity. It is said that free falling objects do not encounter large air resistance and are affected by gravity. In this case, regardless of quality, all objects will fall at the same acceleration. but why? Let's consider the free falling movement of a 1000 kg elephant and a 1 kg full body rat. If Newton's second law applies to descending movement and a free body map is created, you can see that 1000 kilograms of elephant has greater gravity. This greater gravity directly affects the acceleration of the elephant; therefore, based on intensity alone, it can be assumed that a 1000 kilogram baby elephant accelerates faster. But acceleration depends on two factors: strength and quality