Speed at which diver enters water

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Homework Help Overview

The problem involves a diver who jumps from the edge of a swimming pool, landing a certain distance away after a specific time. The subject area pertains to kinematics and projectile motion, specifically analyzing the diver's speed and angle of entry into the water.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the need for additional assumptions regarding the height of the dive and the nature of the dive's trajectory. There is mention of the diver's horizontal and vertical components of motion, with one participant noting confusion about the water's level relative to the diving edge.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem setup. Some guidance has been offered regarding the assumptions necessary for solving the problem, particularly about the level of the water and the trajectory of the dive.

Contextual Notes

There is an implicit assumption that the edge of the pool is level with the water, which affects how the problem is approached. Participants also note the importance of recognizing when additional information is needed to solve the problem effectively.

kinganu123
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Homework Statement


A diver dives from the edge of a swimming pool and lands in the pool 5.7 m away and 0.82 seconds later.
With what speed did the diver dive? At what angle?

Δx=5.7
t=.82
X and Y are independent

Final answer should be 8.04 m/s at a 30 degree angle

Homework Equations


V=V0+at
V2=V02+2aΔx
Δx=V0t+.5at2
Vox=V0cosθ
Voy=V0sinθ

The Attempt at a Solution


Vox=6.95
After that, I'm stumped
I'm missing two variables in every single equation :(
 
Last edited:
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I think you need a couple more assumptions.
If the edge of the pool is level with the water then the path is a parabola - it's the same question as firing a canonball upward and finding where it lands.
 


well that makes a LOT of sense
Thanks a bunch! :D

and to why think I was stuck on this for an hour...
the entire time, i was thinking that the water was below the edge of the pool
 


If it's a diving board and they dived horizontally it would ask you to calculate the height not the angle. If it's a diving board and they jump up you don't have enough info.

After a while you get to spot the questions - it's just practice!
 


Ya, unless it's specifically stated that there is a difference in height I usually just asume that everything is level in problems like these
 

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