A pelican flying along a horizontal path

AI Thread Summary
A pelican drops a fish from a height of 5.4 meters, and the fish travels 8.0 meters horizontally before hitting the water. Participants in the discussion seek to determine the initial speed of the pelican and the time it takes for the fish to fall. They explore relevant kinematic equations for vertical motion, questioning the accuracy of certain formulas. Clarifications are made regarding the proper use of kinematic equations, emphasizing the need for consistent units. The discussion highlights the importance of understanding the physics behind projectile motion.
ArcherofScience
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a pelican flying along a horizontal path...

A pelican flying along a horizontal path drops a fish from a height of 5.4 m. The fish travels 8.0 m horizontally before it hits the watwe below. What was the pelican's initial speed?


Well I'm guessing that y =-5.4m and x= 8.0 m...what do I exactly do after...meaning how do I solve this?
 
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How long does it take to fall 5.4 m? What kinematic equations describe the vertical motion?
 


Y=viy+at?
 


ArcherofScience said:
Y=viy+at?
No. Where did you get that equation? (Note that each term in that equation has different units, so it cannot possibly represent something real.)

Look here for a list of kinematic equations: Basic Equations of 1-D Kinematics
 
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