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A solid cylinder of mass 20 kg has lengt...

A solid cylinder of mass 20 kg has length 1 m and radius 0.2 m. Then its moment of inertia (in kg m ) about its geometrical axis is (in kg `m^2`)

A

0.8

B

0.4

C

0.2

D

0.6

Text Solution

Verified by Experts

The correct Answer is:
B
The moment of inertia of cylinder about the geometrical axis = `(MR^(2))/(2) = (20 xx (0.2)^(2))/(2) = 0.4kg m^(2)`
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Knowledge Check

  • A solid cylinder of mass 20kg has length 1 m and radius 0.2 m. Then its moment of inertia (in kg- m^(2) ) about its geometrical axis is :

    A
    0.8kg-`m^(2)`
    B
    0.4kg-`m^(2)`
    C
    0.2 kg-`m^(2)`
    D
    20.2 kg-`m^(2)`

  • A solid cylinder of mass 20 kg, has length 1 metre and radius 0.5 m. Then its moment of inertia in kgm^(2) ? about its geometrical axis is

    A
    2.5
    B
    5
    C
    1.5
    D
    3

  • A whell of mass 4 kg and radius of gyration 0.4 m is making 300 r.p.m. Its moment of inertia is

    A
    `"6.4 kg m"^(2)`
    B
    `"0.64 kg m"^(2)`
    C
    `"0.32 kg m"^(2)`
    D
    `"64 kg m"^(2)`

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