A force of 20 N applied parallel to the surface of a horizontal table, is just sufficient to make a block of mass 4kg move on the table. Calculate the coefficient of friction between the block and the table. (g = 10ms2)

A force of 20 N applied parallel to the surface of a horizontal table, is just sufficient to make a block of mass 4kg move on the table. Calculate the coefficient of friction between the block and the table. (g = 10ms²)

A 0.05
B 0.20
C 0.50
D 0.80
E 2.00

waec 1992 physics

The correct answer is C. 0.50

Î¼= F/mg = 20/40 = 0.5

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