SS2 First Term Physics Lesson Note – Projectile

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WEEK 5

TOPIC: PROJECTILE

CONTENT

• Concept of projectiles
• Example of projectile motion
• Projectile of bodies at angle to the horizontal
• Horizontal projection

PERIOD ONE

CONCEPT OF PROJECTILE.

Projectile refers to the motion of a body which travels freely in space but under the influence of gravity and air resistance. When a ball in kicked into air, it will travel through space in a plane. The motion in a plane is a combination of upward and horizontal motion.

The path through which a projectile travel is called trajectory.

Example of projectile

In sport,

• Throwing of discus
• Throwing of javelin

In warfare

• Firing of catapult
• Shooting of arrows with bow
• Launching of missiles

Miscellaneous

• Throwing of stones

Projectile of bodies at angle  to the horizontal

When a body is projected at an angle  Θ to the horizontal, the trajectory is a parabola.

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