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## Homework Statement

The flywheel of a steam engine runs with a constant angular speed of 137 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 2.7 h.

What is the magnitude of the tangential component of the linear acceleration of a particle that is located at a distance of 55 cm from the axis of rotation when the flywheel is turning at 68.5 rev/min?

## Homework Equations

[tex]a_t = r\alpha[/tex]

## The Attempt at a Solution

[tex]\alpha = ((137 rev/min) /(2.7h*(60m/1h)) * 2PI = 0.845679 rev/min^2[/tex]

[tex]a_t = .55m * 0.845679[/tex]

I know I am not doing this correctly, I don't understand how to tie in the 68.5rev/min into the equation for the tangential component