2D kinematics -- Calculate the acceleration of the jumping athlete

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Homework Help Overview

The discussion revolves around a 2D kinematics problem involving the calculation of acceleration for a jumping athlete. Participants are exploring the dynamics of motion and the forces acting on the athlete during the jump.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are examining their calculations and questioning where errors may have occurred. There is a focus on determining the direction of acceleration, with one participant noting a potential omission related to the direction of a reactive force.

Discussion Status

Some participants have made progress in their calculations but are still seeking clarity on the direction of acceleration. There is an indication of productive dialogue regarding the forces involved, though no consensus has been reached on the final interpretation.

Contextual Notes

One participant mentions a specific angle related to the reactive force, suggesting that assumptions about direction may need to be revisited. The discussion reflects a collaborative effort to clarify these aspects without providing definitive solutions.

Stewkatt
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Homework Statement
An athlete with a mass of 62 kg jumps and lands on his feet. The ground exerts a total force of 1.1 x 10^3 N [backward 55 degrees up] on his feet. Calculate the acceleration of the athlete
Relevant Equations
F=delta p/delta t =ma
DCD301E4-C8E1-43CD-A362-D64E05F31F14.jpeg

this is my work but the answers say 11 m/s^2 so I made an error somewhere. Also if someone could help me with solving the direction for the acceleration, that would be greatly appreciated.
 
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Perhaps because you have omitted the "backward 55 degrees up" direction of the reactive force.
 
image.jpg

yay, I figured it out. I still have to find the direction of acceleration and that’s it.
 
Stewkatt said:
yay, I figured it out. I still have to find the direction of acceleration and that’s it.
Did you find the direction of acceleration?
 

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