anonymous
  • anonymous
a bicyclist starts from rest and accelerates at 2 rad/s2. In 10 seconds what is the angular velocity of the bike wheels and how many revolutions has the bike wheels completed?
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@ganeshie8
anonymous
  • anonymous
@Frostbite @UsukiDoll
UsukiDoll
  • UsukiDoll
I'm bad at physics :(

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More answers

anonymous
  • anonymous
me too :( thanks anyway my friend :D
anonymous
  • anonymous
i have an attempt at the solution :)
anonymous
  • anonymous
i'll post it?
arindameducationusc
  • arindameducationusc
Can I try?
anonymous
  • anonymous
:D okay
arindameducationusc
  • arindameducationusc
Just check....
arindameducationusc
  • arindameducationusc
one second I did a mistake......
arindameducationusc
  • arindameducationusc
use w^2=2*alpha*t where alpha=2, t=10
arindameducationusc
  • arindameducationusc
sqrt(40) is angular velocity Check it.... i am pretty sure
anonymous
  • anonymous
6.324 you mean? i got 20 rad/s
arindameducationusc
  • arindameducationusc
hmmm....
IrishBoy123
  • IrishBoy123
|dw:1439636369189:dw| post the actual question or a link ??!!
arindameducationusc
  • arindameducationusc
yes its 20.... we get s=100 and putting in v^2-u^2=2*aplha*s we get sqrt(400) which is 20
arindameducationusc
  • arindameducationusc
we get s=100 bu s=1/2*alpha*t^2
arindameducationusc
  • arindameducationusc
yes you are right @KarlaKalurky
anonymous
  • anonymous
haha @IrishBoy123 that's as nice joke :D
arindameducationusc
  • arindameducationusc
w=2*pi*f where f is the frequency
arindameducationusc
  • arindameducationusc
20=2*pi*f f=10/pi
anonymous
  • anonymous
what are the formulas to solve for no. of rev?
arindameducationusc
  • arindameducationusc
w=2*pi/T where w=20 we get T=pi/10 (for one cycle)
anonymous
  • anonymous
100 rad(1rev/(2pi)rad) = 15.9155 rev ?
arindameducationusc
  • arindameducationusc
hmmm.... let me think....
arindameducationusc
  • arindameducationusc
wait.... I got it... w=2*pi*f 20/2*pi=f 3.18 revolution in one second so 10 second, 10*3.18=31.8
arindameducationusc
  • arindameducationusc
This should be the answer @KarlaKalurky
anonymous
  • anonymous
thank you very much! :D
arindameducationusc
  • arindameducationusc
no problem
IrishBoy123
  • IrishBoy123
you need the angular analogues of the equations of motion \(v = u + at \\x = ut + \frac {1}{2} a t^2 \\ v^2 = u^2 + 2 ax\) which are \(\omega_2 = \omega_1 + \alpha t \\\theta = \omega_1t + \frac {1}{2} \alpha t^2 \\ \omega_2^2 = \omega_1^2 + 2 \alpha \theta\)

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