Diver falling into swimming pool - forces

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Homework Help Overview

The discussion revolves around a physics problem involving a diver falling into a swimming pool, focusing on the forces acting on the diver during the fall and subsequent deceleration in the water. The problem includes calculations related to acceleration, force, and velocity.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to calculate the average force exerted on the diver and are discussing the acceleration experienced during the fall and after entering the water. Questions about the diver's speed upon hitting the water and the correct application of kinematic equations are raised.

Discussion Status

There are multiple calculations presented by participants, with some expressing uncertainty about their results. Guidance is offered regarding the use of kinematic equations to find the final velocity and the average force, but no consensus has been reached on the correct values or methods.

Contextual Notes

Participants are working with the assumption that the diver falls freely under gravity before entering the water and that the time taken to stop in the water is critical for calculating forces. There is a mention of potential errors in calculations, indicating a need for careful consideration of the equations used.

Punchlinegirl
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A 88.0 kg diver falls from rest into a swimming pool from a height of 5.30 m. It takes 1.94 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.
I found the acceleration to be 1.41 m/s^2 and then multiplied it by the mass to get 124 N. this wasn't right.
Can someone help me?
Thanks.
 
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I'm getting a larger acceleration, what is his speed as he hits the water?
 
I got the a to be 3.42 m/s^2.
5.30= (1/2)a(1.94^2)
I don't think I did it right though...
 
He is falling under gravity's force at a rate of 9.8m/s^2 and it takes him 1.94 seconds from the moment he penetrates the water surface to the time he becomes stopped (under water), find his final velocity as he hits the water:

[tex]v_f^2 = v_i^2 + 2ad[/tex]

Then You can find the force appliedo n him by multiplying his mass by the average acceleration you found.
 

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