A block rolled on rough surface with velocity of 8m/s comes to rest after travelling 4m. Compute the coefficient of friction (g=10m/s2)
0.8
0.6
0.4
0.5
Solution
Given-
Initial velocity of block, u = 8 m/s,
Distance travelled before the block stops, s = 4 m
Let the coefficient of kinetic friction beetween block and surface be .
F.B.D of the block-
From F.B.D-
Assuming the acceleration of th block to be 'a'.
The block stops (v=0) after travelling displacement of 4m.
Applying 3rd euation of motion-
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