Q.
Block of mass 1 kg is placed on a rough incline as shown. The coefficient of friction between block and incline is 0.4. The acceleration of block is (g = 10 ms–2, √3 = 1.7)
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a
zero
b
5 ms-2
c
6.5 ms-2
d
1.6 ms-2
answer is D.
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Detailed Solution
Applied force = mgsinθ=mg12=0.5mgMaximum frictional force =μmgcosθ =0.4mg32 =0.2×1.7mg =0.34mgacceleration = 0.5mg−0.34mgm=0.16g=1.6m/s2
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