FREEFALL POSITION PHYSICS FREE

Due to air resistance, there is no free fall of any falling body on earth. Since there is no atmosphere on the moon, a body falls freely on the surface of the moon. When a body falls in vacuum or in space, then the body is falling with free fall.

Free fall happens when the acceleration due to gravity is equal to the acceleration of the falling body i.e, $g=a$. There is no any influence of air resistance during free fall.

When a body is falling under the influence of gravity only, then the motion is called free fall. So, weight of a body is also zero at the centre of the earth. As the value of $g$ decreases with the increase in depth from the earth’s surface, weight of a body also decreases with the increase in depth from the earth’s surface.At the centre of the earth, the value of $g$ is zero. As the value of $g$ decreases with the increase in height from the earth’s surface, weight of a body also decreases with the increase in height from the earth’s surface. Weight is less at the equator as there is minimum value of $g$. Weight is more at the poles of earth as there is maximum value of $g$. The place where there is more acceleration due to gravity, there is more weight of a body. Acceleration due to gravity $g$ depends upon many factors such as radius, depth and height from the surface, so weight of the body also depends upon such factors. As the acceleration due to gravity varies from place to place, the weight of the body also varies from place to place. Weight is dependent upon acceleration due to gravity of the planet. If a body has mass $m$ then the weight of the body is given by, It is measured by using a spring balance. Its SI unit is Newton $(N)$ and its CGS unit is Dyne. The force with which an object is attracted towards the centre of the planet is called its weight. We know that every planets attract every objects towards their centres.

Freefall position physics