Understanding Gravity and Arrow Velocity: A Simple Explanation

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SUMMARY

The discussion clarifies the effects of gravity and air resistance on arrow velocity. It establishes that gravity influences the vertical motion of the arrow, slowing it as it rises and accelerating it as it falls. However, the horizontal component of the arrow's velocity remains constant in the absence of air resistance, in accordance with Newton's second law. The primary factor affecting the arrow's overall speed is air friction, not gravity.

PREREQUISITES
  • Understanding of Newton's second law of motion
  • Basic knowledge of projectile motion
  • Familiarity with the concepts of horizontal and vertical components of velocity
  • Awareness of air resistance and its effects on motion
NEXT STEPS
  • Research the principles of projectile motion in physics
  • Explore the effects of air resistance on different projectiles
  • Study Newton's laws of motion in greater detail
  • Investigate real-world applications of these principles in archery and ballistics
USEFUL FOR

Physics students, archery enthusiasts, and anyone interested in understanding the dynamics of projectile motion and the effects of gravity and air resistance.

Iainhol
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I am currently at my in-laws in VT where a hunting debate came up. They say that gravity is slowing down the arrow. I stated that the x and the y act independently, therefore the forward momentum is the same. The only force slowing the arrow down is friction from air, therefore if there was no air the velocity would be the same (Newton's second law). Am I correct?
 
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As the arrow rises, gravity acts to slow it down; as it falls, gravity acts to speed it up. Just like any other projectile. But you are correct that, ignoring air resistance, the horizontal component of the velocity would remain unchanged.
 

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