ATA ATA Bow Tech Bow Mechanics & Physics 2

Question 1

What is 'draw force curve' in archery?

Accepted Answer

A graph showing the relationship between draw length and draw weight throughout the draw cycle

Answer

The draw force curve illustrates how peak weight builds and then decreases at let-off as the shooter pulls the bow to full draw.

Question 2

How does increasing draw weight affect kinetic energy delivered to the arrow?

Accepted Answer

Higher draw weight increases kinetic energy, improving penetration

Answer

Kinetic energy (½mv²) increases with arrow speed, which rises with higher draw weight, resulting in deeper penetration on game.

Question 3

What is 'valley' in the context of a compound bow's draw cycle?

Accepted Answer

The point in the draw cycle where let-off is achieved and holding weight is at its lowest

Answer

The valley is the comfortable holding zone at full draw where the cam has rotated through peak weight and let-off is engaged.

Question 4

Arrow spine refers to which property of an arrow?

Accepted Answer

The stiffness or resistance to bending under a given load

Answer

Spine is the standardized measure of an arrow's lateral stiffness, critical for matching arrows to a specific bow's draw weight and length.

Question 5

What physical phenomenon causes an arrow to bend and oscillate as it leaves the bow?

Accepted Answer

Archer's paradox

Answer

Archer's paradox is the bending and oscillation of the arrow shaft as it navigates around the riser during the power stroke.

(ATA) Archery Trade Association Bow Technician Certification Practice Test