physics question

Question

A block of mass 10 kg slides down an inclined plane elevated 30◦ to the horizontal. If the coefficient of kinetic friction is 0.6, find the acceleration of the block.

Answer 1

mgsin30° - μmgcos30° = ma; a = g(sin30° - μcos30°) = 9.8 m/s²(sin30° - 0.6cos30°) =

- 0.192 m/s²