A) 6 N
B) 5.88 N
C) 7 N
D) 9 N
Correct Answer: A
Solution :
The frictional force acting on the block \[f=\mu R\] but from figure, \[R=mg\] \[f=\mu \,m\,g\] Here, \[\mu =0.6,\,m=1\,kg,\,g=10\,m/{{s}^{2}}\] \[\therefore \] \[f=0.6\times 1\times 10\,=6N\] Note: Due to acceleration of truck, the block experiences a forward force \[F=ma=1\times 5=5N\] Since \[f>F,\] so block is not displaced from its previous position.You need to login to perform this action.
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