How to Calculate Acceleration for a Car Speeding from 10m/s to 15m/s in 80m"

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Homework Help Overview

The discussion revolves around calculating the acceleration of a car that is increasing its speed from 10 m/s to 15 m/s over a distance of 80 m. The subject area is kinematics, specifically focusing on the relationships between velocity, acceleration, and distance.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss various equations related to motion, including those for acceleration and distance. Some express confusion about the applicability of certain equations when the initial velocity is not zero. Others suggest alternative equations that might be more suitable for the given scenario.

Discussion Status

The discussion is ongoing, with participants exploring different equations and questioning the assumptions made regarding initial conditions. Some guidance has been offered regarding the use of specific formulas, but no consensus has been reached on the best approach to solve the problem.

Contextual Notes

There is a noted concern about the validity of certain equations when the initial velocity is not zero, which may affect the participants' understanding of how to apply them correctly in this context.

Oceanspire
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Poster has been reminded that they need to show some effort when posting schoolwork problems
1. What acceleration would be needed by a car speeding up from 10 m/s to 15 m/s in 80 m?2. The equations I have at my use right now are:
V = at
D = (1/2)(a)(t)^2
T = square root of 2D / A
A = change in velocity / time3. I honestly can't wrap my mind around how to solve this
 
Last edited by a moderator:
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Oceanspire said:
1. What acceleration would be needed by a car speeding up from 10 m/s to 15 m/s in 80 m?2. The equations I have at my use right now are:
V = at
D = (1/2)(a)(t)^2
T = square root of 2D / A
A = change in velocity / time3. I honestly can't wrap my mind around how to solve this
Welcome to PF!

Your equations are valid when the initial velocity is zero. It is not the case in the problem.
 
Can't you use vf2 = vi2 + 2ad ?

You have vf, vi, d, and now you will have to find a.

:)
 
Last edited:
Antonius said:
Can't you use vf = vi + 2ad ?

You have vf, vi, d, and now you will have to find a.

:)
Don't you need to square those velocities ?
 
SammyS said:
Don't you need to square those velocities ?
SammyS said:
Don't you need to square those velocities ?

sorry
i edited it now (Y)
 

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