## Question:

The angular acceleration of the 600-mm-radius circular plate shown is defined by the relation $\alpha={ \alpha }_{ 0 }{ e }^{ -1 }$ Knowing that the plate is at rest when t=0 and that ${ \alpha }_{ 0 }=10 rad/{ s }^{ 2 }$ , determine the magnitude of the total acceleration of Point B when (a) t=0, (b) t=0.5 s, (c) t=$\infty$.