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A mass of 0.1kg is rotated in a verticla...

A mass of 0.1kg is rotated in a verticla circle using a string of length 1m. When the string makes an angle `30^(@)` with the vertical, the speed of the mass is `2 ms^(-1)`. The radial acceleration of the mass at that instant is

A

`4ms^(-2)`

B

`0.1ms^(-2)`

C

`0.4ms^(-2)`

D

`4ms^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • A mass of 0.1kg is rotated in a vertical circle using a string of length 1m. When the string makes an angle 30^(@) with the vertical, the speed of the mass is 2ms^(-1) . The radial acceleration of the mass at that instant is

    A
    `4ms^(-2)`
    B
    `0.1 ms^(-2)`
    C
    `4ms^(-2)`
    D
    `4ms^(-2)`

  • A mass of 0.1kg is rotated in a vertical circle using a string of length 20cm. When the string makes an angle 30^(@) with the vertical, the speed of the mass is 1.5 ms^(-1) . The tangential acceleration of the mass at that instant is

    A
    `4.9 ms^(-2)`
    B
    `9.8 ms^(-2)`
    C
    `2.45 ms^(-2)`
    D
    `19.6 ms^(-2)`

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    A
    `4.9 ms^(-2)`
    B
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    C
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    D
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