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A rigid body of moment of inertia l has ...

A rigid body of moment of inertia `l` has an angular acceleration `alpha`. If the instantaneous power is `P` then, the instantaneous angular velocity of the body is

A

`Plalpha`

B

`P// l alpha`

C

`Pl //alpha`

D

`Palpha//l`

Text Solution

Verified by Experts

The correct Answer is:
B
Power, `P=tauomega` or `omega=(P)/(lalpha)[becausetu=lalpha]`
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Moment Of Inertia Of Rigid Body

Knowledge Check

  • The product of moment of inertia (I) and angular acceleration (alpha) is called

    A
    force
    B
    torque
    C
    angular momentum
    D
    work

  • The instantaneous velocity of a body can be measured

    A
    Graphically
    B
    Vectorially
    C
    By speedometer
    D
    None of these

  • If P is the power supplied to a rotating body, having moment of inertia I and angular acceleration alpha , then its instantaneous angular velocity is given by

    A
    `omega=(PI)/(alpha)`
    B
    `omega=(P)/(Ialpha)`
    C
    `omega=Pialpha`
    D
    `omega=(I)/(Palpha)`

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