ATAR Notes: Forum

Uni Stuff => Science => Faculties => Physics => Topic started by: QuantumJG on December 22, 2009, 05:56:29 pm

Title: Quantum JG's first year physics revision thread!
Post by: QuantumJG on December 22, 2009, 05:56:29 pm: Hey,

I'm basically doing all the questions out of my first year physics textbook to try and make sure I understand everything for next year and I came across this question that has me stumped.

Quote
A car starts from rest in a curve of radius 120m and accelerates at 1ms^-2. Through what angle will the car have travelled when the magnitude of its total acceleration is 2ms^-2

It seems so simple but I can't seem to get it.

All I know is that,

$a = \sqrt{ a_{t} + a_{r} }$

so we have,

a_i = 1ms^-2

a_f = 2ms^-2 = $\sqrt{ a_{t} + a_{r} }$
Title: Re: Quantum JG's first year physics revision thread!
Post by: Damo17 on December 22, 2009, 06:18:23 pm: Quote from: QuantumJG on December 22, 2009, 05:56:29 pm
Hey,

I'm basically doing all the questions out of my first year physics textbook to try and make sure I understand everything for next year and I came across this question that has me stumped.

Quote
A car starts from rest in a curve of radius 120m and accelerates at 1ms^-2. Through what angle will the car have travelled when the magnitude of its total acceleration is 2ms^-2

It seems so simple but I can't seem to get it.

All I know is that,

$a = \sqrt{ a_{t} + a_{r} }$

so we have,

a_i = 1ms^-2

a_f = 2ms^-2 = $\sqrt{ a_{t} + a_{r} }$

http://www.jiskha.com/display.cgi?id=1253675091 ;)
Title: Re: Quantum JG's first year physics revision thread!
Post by: QuantumJG on December 22, 2009, 06:21:17 pm: Quote from: Damo17 on December 22, 2009, 06:18:23 pm
Quote from: QuantumJG on December 22, 2009, 05:56:29 pm
Hey,

I'm basically doing all the questions out of my first year physics textbook to try and make sure I understand everything for next year and I came across this question that has me stumped.

Quote
A car starts from rest in a curve of radius 120m and accelerates at 1ms^-2. Through what angle will the car have travelled when the magnitude of its total acceleration is 2ms^-2

It seems so simple but I can't seem to get it.

All I know is that,

$a = \sqrt{ a_{t} + a_{r} }$

so we have,

a_i = 1ms^-2

a_f = 2ms^-2 = $\sqrt{ a_{t} + a_{r} }$

http://www.jiskha.com/display.cgi?id=1253675091 ;)

WTF! Thats my question.

lol