A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60o to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail?

A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60^o to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail?

A 2âˆš3 N
B 4 N
C 4âˆš3 N
D 8 N
E 2 N

waec 1989 physics

The correct answer is A. 2âˆš3 N

F = 4 x sin 60^o

F = 4 x â3/2 = 2â3 N

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