# P5c - Projectile Motion

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• Created by: natalie27
• Created on: 28-11-13 18:43
• P5c - Projectile Motion
• Gravity
• If air resistance is ignored, the only force acting on the projectile is gravity.
• Gravity can only cause a downward acceleration and can only affect the object's vertical velocity
• E.g. a stone kicked off a cliff will follow a curved trajectory as it falls to the ground/sea.
• The Earth's gravitational field pulls it towards the ground
• The curve is described as parabolic.
• Projectiles
• P5c - Projectile Motion
• Gravity
• If air resistance is ignored, the only force acting on the projectile is gravity.
• Gravity can only cause a downward acceleration and can only affect the object's vertical velocity
• E.g. a stone kicked off a cliff will follow a curved trajectory as it falls to the ground/sea.
• The Earth's gravitational field pulls it towards the ground
• The curve is described as parabolic.
• When cannon balls or missiles are fired into the air, they are called projectiles
• If a projectile is projected horizontally, two things could happen...
• The object's horizontal velocity (a vector) will stay the same i.e. (constant)
• The object will accelerate towards the ground so its vertical velocity (a vector) will increase steadily.
• When cannon balls or missiles are fired into the air, they are called projectiles