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  4. The friction coefficient between A &B is μ 1=0.25 and between B floor is μ 2=0.2. The horizontal force F needed to move the block B is :- <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-uluvkqljjm7fdyos.jpg />

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Q. The friction coefficient between $A\&B$ is $\mu _{1}=0.25$ and between $B\&$ floor is $\mu _{2}=0.2.$ The horizontal force $F$ needed to move the block $B$ is :-
Question

NTA AbhyasNTA Abhyas 2020

Solution:

Solution
$f_{1}=0.25\times 2000$
$=500N$
Solution
$f_{2}=0.2\left(\right.200+300\left.\right)\times 10=1000N$
$F=f_{1}+f_{2}=1500N$