This acceleration is known as the gravitational acceleration. This causes the velocity of the object to be increased thus creating acceleration. When an object is on a free fall, the gravitational potential energy of the object is converted to kinetic energy. The gravitational potential energy of an object is defined as the work done on the object when the object is taken from infinity to the said point. Since the gravitational potential at infinity is zero, and the amount of work has to be done is negative, the gravitational potential is always negative. The gravitational potential at a point is defined as the amount of work done on a unit mass when bringing it from infinity to the given point. The gravitational force between these two masses is G.m 1.m 2 / r 2 where G is the universal gravitational constant. Take masses m 1 and m 2 placed in a distance r from one another. There is a gravitational field defined around any mass. Mass is the necessary and the sufficient condition for gravity. Gravity is the force that occurs due to any mass. To understand the concept of free fall properly, one must first understand the gravitational field and gravitational potential. The motion of the object is an inertial motion. In this article, we are going to discuss what free fall and projectile motion are, their applications, similarities between these two, definitions of free fall and projectile motion and finally the difference between free fall and projectile motion.įree fall is described, as a motion of an object where the gravitational force is the only force acting on the object. It is vital to have a clear understanding in these concepts in order to excel in such fields. These two phenomena are of utmost importance and play a vital part in fields such as space exploration, weather systems, aviation, military applications and even sports. Apart from this, we can also use a position-time graph for finding instantaneous velocity.Free fall and projectile motion are two very important concepts discussed under mechanics. We can find average velocity on a position-time graph. The Position-time graph aids in understanding an object’s speed. While solving problems in graphs can also be used to calculate speed. Odometers are used to track the distance traveled. Speedometers are used in automobiles to measure speed. When you look at a speedometer in a car, you are seeing the instantaneous speed of the car. It tells us about how fast an object is moving anywhere along its path. Instantaneous speed :- The instantaneous speed of a particle is the speed of the particle at any instant of time or at any point on its path.
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