(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 60 cm diameter wheel accelerates uniformly about its center from 120 rpm to 300 rpm in 5s.

1) Determine its angular acceleration.

2) Determine the radial component of the linear acceleration of a point on the edge of the wheel 2s after it has started accelerating.

3)Determine the tangential component of the linear acceleration of a point on the edge of the wheel 2s after it has started accelerating.

2. Relevant equations

1) alpha=w2-w1/delta(t)

2 and 3) w'=w+alpha t'

v=Rw'

radial component=v^2/r

tangential component =alpha r

BUT alpha=radial+tangential

3. The attempt at a solution

1) I determined that alpha = 3.77rad/s^2

2)w'=120*2pi/60 + 3.77*2s

w'=20

v=.6/2*20 = 6

radial = 6^2/.3 = 120 m/s^2

this seems very high!! shouldn't it be less than 3.77?

3) tangential = 3.77*.3 = 1.131 m/s^2

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# Homework Help: Tangential and radial components of acceleration - answer seems odd

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