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Since the upward velocity has now become zero, the ball stops rising. This is when the ball reaches the middle point of the trajectory curve. As the ball continues to rise upward, every second its velocity gets retarded by 9.8 m/s 2, until at one point it becomes zero, that is V y = 0. At the instant the ball leaves your hand, V y has a certain value determined by the force with which the ball is thrown. V y, however, will suffer from retardation caused by the force of gravity. Therefore, as there is no force to oppose it, V x = V 0 will remain constant throughout the flight.
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The only force acting on the ball is the force of gravity in the downward direction. The angle at which the ball is thrown is θ. The vector sum of both these velocities is given by V 0. The initial value of V x is represented by V x0, and the initial value of V y is given by V y0. When the ball leaves your hand, it has two velocities, (V y) in the vertical direction and (V x) in the horizontal direction. V y0 is the initial velocity along y-axis. V x0 is the initial velocity along x-axis. Sounds interesting? Then let’s go ahead and learn more about it. It allows us to describe a variety of different motions, right from those of baseballs and cannonballs, to even the motion of aircraft. An interesting application of kinematics is in the study of projectile motion. Kinematics, which is the branch of classical mechanics concerned with studying the motion of objects, is almost entirely based on these Newtonian laws. Instead, what he did was formulate a set of laws which later became the very foundation of classical mechanics.
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He didn’t shout curses at the tree for the lump on his head, nor did he decide to take revenge on the apple by devouring all its ripe and plump juiciness. When the apple famously fell on the great Issac Newton’s head, there were two things which he did not do. Amazingly, if at the instant that the trigger is pressed, another similar bullet is dropped down vertically from the same height, both the bullets will hit the ground at the same time. A bullet fired horizontally from a gun inside a vacuum with no obstacles in its path, will follow the rules of projectile motion.
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