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

A mass of 0.1 kg is rotated in a vertical circle using a string of legth 20 cm. When the string makes an angle `30^(@)` with the vertical, the speed of the mass is `1.5ms^(-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^(-1)`

D

`19.6 ms^(-2)`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • A mass of 0.1 kg is rotated in a vertical circle using a string of length 20 cm. 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)`

  • 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)`
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    C
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