A wheel is set rotating with a constant angular acceleration, starting from rest

Question

A wheel is set rotating with a constant angular acceleration, starting from rest.

1 a.) Which graph shows a proper shape of the tangential acceleration at vs. time for a wheel that starts at rest and experiences constant angular acceleration ?? (a-f or none of the above)

b.) Is the tangential acceleration constant in magnitude? (Y/N)

2 a.) Which graph shows a proper shape of the centripetal acceleration ac vs. time for a wheel that starts at rest and experiences constant angular acceleration ?? (a-f or none of the above)

b.) Is the tangential acceleration constant in magnitude? (Y/N)

Explanation / Answer

a) a=alphaR Since both alpha and R is constant So a is constant So,f is correct b)Yes 2) a)a=w^R aplha^2t^2R which is parabolic So,b is correct b)Tangential acceleration is constant but centripetal acc is not constant

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