Bullet droped and fired

[shoey]

True....in ballistic trajectory, the air resistance counters gravity for a little while, hence the arc and therefore the discrepency in fall time.

[gmcfixer]

Originally Posted by shoey

True....in ballistic trajectory, the air resistance counters gravity for a little while, hence the arc and therefore the discrepency in fall time.

In physics air resistance effects the forward motion, any air resistance on the downward movement is a constant.

Dave Z

[Redrum]

Originally Posted by gmcfixer

In physics air resistance effects the forward motion, any air resistance on the downward movement is a constant.

Dave Z

That is true if you performed the experiment in normal air. The only way both bullets will hit the floor at the exact same time is if the entire experiment is performed in a vacuum to eliminate any air resistance, whether vertical due to drag, or horizontal due to gravity or air turbulance. Also, the time for the bullet to drop is calculated at the moment it leaves the barrel. Velocity has no effect on how long the bullet stays in the air. (the barrel must be parallel to the ground). It will stay in the air the same time if it fired or dropped. Gravity is constant at 32 ft/sec/sec. the bullet weight is constant throughout the flight (ignoring any residuals left on the lands and grooves). See explaination here. http://74.125.95.132/search?q=cache:...&ct=clnk&gl=us