A block of mass \( 1 \mathrm{~kg} \) is projected from point \( A \) along irregular rough incli...

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A block of mass \( 1 \mathrm{~kg} \) is projected from point \( A \) along irregular rough inclined surface and reaches at the point \( B \) as shown in the figure. The coefficient of friction between the block and the inclined plane is \( 0.5 \). Find work done by the friction on the block, if \( A C=1 \mathrm{~m} \).
(a) \( -1 \mathrm{~J} \)
(b) \( -2 \mathrm{~J} \)
(c) \( -4 \mathrm{~J} \)
(d) \( -5 \mathrm{~J} \)
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