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Explain angular acceleration .Establish ...

Explain angular acceleration .Establish its relation with linear acceleration.

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Knowledge Check

  • The SI unit of angular acceleration is

    A
    radian/s
    B
    radian/s
    C
    radian`/s^(2)`
    D
    meter `r/s^(2)`

  • A disc of radius R rolls on a horizontal ground with linear acceleration a and angular acceleration alpha as shown in Fig. The magnitude of acceleration of point P as shown in the figure at an instant when its linear velocity is v and angular velocity is omega will be a

    A
    `sqrt((a+ralpha)^(2)+(romega^(2))^(2))`
    B
    `(ar)/R`
    C
    `sqrt(r^(2)alpha^(2)+r^(2)omega^(4))`
    D
    `ralpha`

  • A point mass moves along a circle of radius R with a constant angular acceleration alpha . How much time is needed after motion begins for the radial acceleration of the point mass to be equal to its tangential acceleration ?

    A
    `sqrt((1)/(alpha))`
    B
    `sqrt((R)/(alpha))`
    C
    `sqrt((2)/(alpha))`
    D
    `sqrt((1)/(2alpha))`

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    A disc rotates with constant angular velocity. Doesa point on its rim have a tangential acceleration or a radial acceleration ? Are these accelerations constant ? '

    Name the rotational analogue of linear acceleration.

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