How long did this car accelerate

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    Accelerate Car
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Homework Help Overview

The discussion revolves around a physics problem involving a car that accelerates at a specified rate until it reaches a certain speed. The original poster seeks assistance in determining the duration of the acceleration and the distance traveled during this time.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the application of Newton's laws and relevant equations, particularly questioning the initial velocity of the car. Some express uncertainty about their understanding of the physics concepts involved.

Discussion Status

Participants are actively engaging with the problem, with some providing equations and others seeking clarification on the initial conditions. There is a mix of attempts to apply formulas and requests for further guidance, indicating a collaborative exploration of the topic.

Contextual Notes

There are indications of confusion regarding the initial velocity, with suggestions that it could be zero or that the problem may be misinterpreted. Additionally, the forum rules emphasize showing work rather than providing direct solutions.

ryansmith885
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Hello

I need help with a question i am doing: A car accelerates at 2.4ms^-2 until it reaches a speed of 16ms^-1 how long did it accelerate for? and what distance did it travel while accelerating? could someone please help me...
Thanks
Ryan
 
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Use Newton's laws and show ur work.(forum rule : Show people the path, don't drive them through).
 
um yeah that's where its gets difficult cuause i don't know how.. I am not very good at physics... mayb u could show me a couple more tips...a few formulas or something
thanx
 
k. one of the equation is v = u + at
where v - final vel.
u - initial vel.
a - acceleration
t - time
since its not clear(atleast to me) what is the initial vel. you can take it to be zero or report the question is wrong :)
 
ok thank u a lot for your help i also have another question:

the charge of one electron is -1.6x10^-19 am i correct?

so if i have a paint particle that carries 1.2 x 10^10 electrons (12000000000)what is the toatal charge it carries: i tried -1.6x10^-19 = -0.00000000000000000016 so i tried
-0.00000000000000000016 x 12000000000 electrons is this method correct? thanks again
 
ryansmith885 said:
Hello

I need help with a question i am doing: A car accelerates at 2.4ms^-2 until it reaches a speed of 16ms^-1 how long did it accelerate for? and what distance did it travel while accelerating? could someone please help me...
Thanks
Ryan

To find the time:

v=at

To find the distance:

ax=½v²
 

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