A) \[2N\]
B) \[0.4N\]
C) \[2.4N\]
D) \[9.8N\]
Correct Answer: A
Solution :
The eraser is pressed against the black board. Taking the vertical and horizontal components of forces, we have \[F=\mu R\] where, R is reaction of the board on the rubber. Given, \[R=5N,\mu =0.4\] \[\therefore \] \[F=0.4\times 5=2N\]You need to login to perform this action.
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