Question on: WAEC Physics - 1989
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
2√3 N
B
4 N
C
4√3 N
D
8 N
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Correct Option: A
F = 4 x sin 60o
F = 4 x √3/2 = 2√3 N
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