Slingshot Physics: Elastic Energy, Projectile Motion & Performance Factors

A slingshot (Y-frame, elastic bands, pouch) converts elastic potential energy → kinetic energy.

Energy Transfer

1. Pull back: Bands stretch → store elastic energy (½kx²).
2. Release: Bands contract → exert force on projectile → accelerate it.
3. Projectile velocity depends on: stored energy, projectile mass, release efficiency.

Performance Factors

• Band size/strength: Thicker, stronger bands → more energy → higher velocity.
• Projectile mass: Lighter → faster (v ∝ 1/√m for fixed energy).
• Projectile shape: Streamlined → less drag → better range/accuracy.
• Launch angle: 45° max range (no drag); lower for flat trajectory.
• Band material/condition: Latex vs. synthetic; degradation reduces power.

Safety

Eye protection mandatory. Never aim at people/animals/property. Legal restrictions vary—check local laws.