| A block of mass 10 kg is kept on the fixed incline having coefficient of friction 0.8. Find the force of friction exerted on the block by inclined: |
 |
A) 100 N
B) 64 N
C) 80 N
D) 60 N
Correct Answer: D
Solution :
| Friction required \[=\,\,mg\,\sin \,37{}^\circ \] |
| \[=10\times 10\times \frac{3}{5}=60\,N\] |
| Maximum friction provided \[=\mu \,mg\,\cos \,37{}^\circ \] |
| \[=0.8\times 10\times 10\times \frac{4}{5}=64\,\,N\] |
| So friction force will be 60 N. |
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