Calculate the sprinters average acceleration

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Homework Help Overview

The problem involves calculating the average acceleration of a sprinter based on given velocities at specific times. The context is kinematics, focusing on the change in velocity over time.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the vector nature of velocities and question how to calculate the change in velocity given the directions. There is also a mention of unit conversion, although it appears to be unrelated to the specific problem at hand.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the velocities involved. Some guidance has been offered regarding the vector nature of the quantities, but no consensus has been reached on the approach to the problem.

Contextual Notes

There seems to be confusion regarding the units of measurement, with some participants referencing km/h, which does not apply to the current problem. This indicates a potential misunderstanding of the problem's requirements.

jeahomgrajan
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Homework Statement


A sprinter has a velocity of 6.0m/s at t=3.0s.
Five seconds later he is moving north with a speed of 4.0m/s. calculate the sprinters average acceleration


Homework Equations



average acceleration=change in velocity/elapsed time

The Attempt at a Solution



t1=3.0s, v1=6.0m/s, t2=8.0s, v2=-4.0m/s
 
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Your velocities (and acceleration) are vectors. They have a direction. What's vf-vi if vf=4m/s [n] and vi=6m/s ?
 
yeah i can jjust solve it, suppose i needed to change km/h/s to m/s^2
 
jeahomgrajan said:
yeah i can jjust solve it, suppose i needed to change km/h/s to m/s^2

I think you are thinking of a different problem. There's no km/hr in this one.
 
jeahomgrajan said:
yeah i can jjust solve it, suppose i needed to change km/h/s to m/s^2

Not sure how that relates to the question. They're already in standard units.
 
yeah i know I am just asking generally
 

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