A block is lying on an inclined plane which makes $60^°$ with the horizontal. If coefficient of friction between block and plane is $0.25$ and $g = 10\,m/{s^2}$, then acceleration of the block when it moves along the plane will be ........ $m/s^2$
  • A$2.50$
  • B$5.00$
  • C$7.4$
  • D$8.66$
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