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  4. Calculate the acceleration of the block and trolly system shown in the figure The coefficient of kinetic friction between the trolly and the surface is 0.05. (g = 10 m/s2, mass of the string is negligible and no other friction exists <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/10e8b019afacc808eeffdaea252709a7-.png />

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Q. Calculate the acceleration of the block and trolly system shown in the figure The coefficient of kinetic friction between the trolly and the surface is $0.05. (g = 10 \,m/s^{2}$, mass of the string is negligible and no other friction exists
image

NEETNEET 2020Laws of Motion

Solution:

image
$a=\frac{20-5}{12}$
$=1.25\,m/s^{2}$