projection speed
projection angle
projection height
Y axis equals altitude and X axis is distance.
hypothesis on projectile motion
Because a projectile by definition, is in motion.
Projectile motion has two components horizontal motion and vertical motion. Gravity affects only the vertical motion of projectile motion.
No. Neglecting air resistance, the projectile follows a parabola. The horizontal distance is proportional to 'time', and the vertical distance is proportional to 'time squared'. This is exactly the description of a parabola.
motion of a projectile
gravity
Gravity
A feather falling in a vacuum is not considered as a projectile motion. Gravity, which is absent in a vacuum, is one of the components of projectile motion.
Gravity
Gravity
No, gravity is only one of the vectors in projectile motion.