First slide

Static friction

Question

If the coefficient of friction between all surfaces is 0.4, then find the minimum force F to have equilibrium of the system. (Take, g = 10 ms^-2)

Moderate

A

62.5 N
B

150 N
C

135 N
D

50N

Solution

2T = 250
$\Rightarrow T = 125 N$
$A l s o, T + 0.4 F = 150$
$\Rightarrow F = 62.5 N$

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