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A conical pendulum of length 1 m makes a...

A conical pendulum of length 1 m makes an angle `theta = 45^@` w.rt Z-axis and moves in a circle in the XY plane. The radius of the circle is 0.4 m and its center is vertically below O. The speed of the pendulum, in its circular path, will be : (Take `g=10ms^(-2))`

A

`0.4 m//s`

B

`2 m//s`

C

`0.2 m//s`

D

`4 m//s`

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The correct Answer is:
B
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