Concepts of Horizontal, Vertical, and Projectile motion

• Motion - is the action of changing location or position.
• Intertia - It is an object's resistance to changing its motion

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• Velocity - The speed and direction of an object in motion.
• Acceleration -The change in an object's velocity.
• Aristotle held that the Universe was divided into two regions, the terrestrial region and the celestial region. He also divided motion into two main classes which are natural motion and violent motion.
• Galileo Galilei believed that a projectile motion is a combination of uniform motion in the horizontal direction and uniformly accelerated motion in the vertical direction.
• Vertical motion - is referred to as natural motion. In a natural motion, the object will move and will return to its natural state based on the object's material or composition - earth, water, air, and fire.
• Horizontal motion of aristotle - An object moving in a violent motion requires push or pull to maintain horizontal motion. Motion continues only so long as there is an applied force to an object. When the force is removed, motion stops.
• Projectile motion of aristotle - believed that the projectile motion of an object is parallel to the ground until it is the object's time to fall back into the ground.
• Vertical motion of galileo - In the absence of a resistance, objects would fall not depending on their weight, but in the time of fall. Also, if the object encountered a resistive force from a fluid equal or greater than its weight, it will slow down and reaches a uniform motion until it reaches the bottom and stops.
• Horizontal motion of galileo - An object in motion, if unimpeded, will continue to be in motion, and an external force is not necessary to maintain the motion. If the Earth’s surface is very flat and extended infinitely, objects that are pushed will not be impeded. Thus, the objects will continue to move. This kind of motion, however, is not evident in nature.
• Projectile motion of galileo - performed experiments on uniformly accelerated motion using an inclined plane, and used the same apparatus to study projectile motion.