SCIENCE 9

• TRAJECTORY - curved path ( parabola ) motion
• THREEE TYPES OF PROJECTILE - Object dropped at rest - object being thrown vertically upward - Thrown upward to an angle to the horizontal
• PROJECTILE - is any object that once projected or dropped continues motion by its own inertia and is influenced by tyhe downward force of gravity
• Acceleration due to the gravity - -9.8m/s2
• TWO MOTION IN PROJECTILE - Horizontal Motion - Vertical Motion
• when gravity acts, the acceleration changing by -9.8m/s each second
• Vx - horizontal velocity
• Vy - Vertical velocity
• Range - horizontal distance covered by projectile
• Height - vertical distance from the projectile to the earth's surface
• TWO SIMULTANEOUS INDEPENDENT RECTILINEAR MOTION: - Along the X-AXIS - unifrom velocity ( horizontal motion- forward) - Along the Y-Axis - uniforn acceleration ( vertical motion - downward)
• HORIZONTAL LAUNCHED PROJECTILES - are projectiles that are launched with an initial velocity from an elevated position and follows a curved-like path to the ground
• horizontal velocity - CONSTANT
• VERTICAL VELOCITY - Viv = Vi sin o
• HORIZONTAL VELOCITY - Viv = Vi cos 0
• TIME - T = 2Visin0 / a
• RANGE - Vi2sin20/a