A 10 kg block slides without acceleratio...

A 10 kg block slides without acceleration down a rough inclined plane making an angle of `20^(@)` with the horizontal. Calculate the acceleration when the inclination of the plane is increased to `30^(@)` and the work done over a distance of `1.2m`. Take `g=9.8ms^(-2)`.

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The correct Answer is:

`1.8ms^(-2),21.6J`

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