1.

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

Answer»

`4MS^(-2)`
`0.1ms^(-2)`
`0.4ms^(-2)`
`4ms^(-2)`

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