An eraser weighing 2 N is pressed against the black board with a force of 5 N. If the coefficient of friction is 0.4. How much force parallel to the black board is required to slide the eraser upwards.
A
2 N
B
2.8 N
C
4 N
D
4.8 N
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The correct Answer is:
D
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An eraser weighing 2N is pressed against the black board with a force of 5N. If the coefficient of friction is 0.4. How much force parallel to the black board is required to slide the eraser upwards
