Question

Assuming coefficient of friction 0.25 between block and incline. Find the acceleration of each block in fig.

• A. g/5
• B. g/7
• C. g/6
• D. None of these

Answer 1

Answer: (A)

g/5

Answer 2

m₂a = T₁ – T₂ – m₂g sin 37 - μm₂g cos 37

or a = $\frac { \mathrm { T } _ { 1 } - \mathrm { T } _ { 2 } } { \mathrm {~m} _ { 2 } }$ - g sin 37 - $\frac { 1 } { 4 }$ g cos 37

or T₁ – T₂ – 0.8g = a …….. (ii)

T₂ – 0.5 g = 0.5a ……… (iii)

m₁ g – T₁ = m₁a

or 2g – T₁ = 2a …. …. (i)

Adding (i), (ii) and (iii) 3.5 a = 0.7 g

or a = g/5.