BRAINCAKEProjectile Motion
A projectile is an object upon which the only force is gravity.
The vertical and horizontal motions are independent.
Horizontally, the velocity is constant. As there is no horizontal force, there is no horizontal acceleration
Horizontally, the motion is described by
s = u t
Vertically, the motion is described by
s = ut + ½gt2
as it is accelerating due to gravity.
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Key terms in this lesson
- velocity
- The rate of change of displacement of an object; speed in a given direction.
- acceleration
- The rate of change of velocity of an object.
More in Forces and Motion
- Displacement on a Velocity-time Graph
- Acceleration
- Equations of Motion - Uniform Acceleration
- Free Fall Under Gravity
- Car Stopping Distances
- Weight, Mass, Accleration
- Centre of Mass
- Free-Body Force Diagrams
All 17 lessons in Forces and Motion · All OCR AS-level Physics topics