In this question use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.
A rough plane is inclined to the horizontal at an angle α\alphaα, where tanα=512\displaystyle \tan\alpha = \frac{5}{12}tanα=125. A block of mass m m\,m kg is placed on the plane and released from rest. The coefficient of friction between the block and the plane is 25\displaystyle \frac{2}{5}52.
Find the acceleration of the block.
A different block, of mass 2m kg, is placed on the same plane and released from rest. State how the acceleration of this block compares with your answer to part (a), and explain why.