How does a bow transfer stored energy into the motion of an arrow?

A bow functions by acting as a mechanical device that accumulates and releases energy to propel a projectile at speeds greater than what can be achieved by throwing it by hand.1

The process of transferring energy occurs in three primary stages:

• Energy Storage: As an archer pulls the bowstring back, the force exerted by the muscles of the back and arms is stored within the bow limbs as potential energy.12
• Holding: This energy is held temporarily while the archer aims.1
• Energy Release: Upon release, the bow converts the stored potential energy into kinetic energy. This energy is transferred to the bowstring and subsequently to the arrow, imparting the velocity necessary for flight.12

The efficiency of this transfer—the percentage of energy in a fully drawn bow that reaches the arrow—varies by design, with modern composite materials significantly improving performance compared to traditional wooden bows. Ultimately, the bow overcomes the inherent limitations of human muscle by releasing the stored energy at a much higher velocity than the archer could produce alone.12