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JAMB - Physics (1989 - No. 2)
The magnitude of the resultant of two mutually perpendicular forces, F
1
and F
2
is 13N, if the magnitude of F
1
is 5N, what is the magnitude of F
2
?
2.6N
6.0N
12.0N
18.0N
解释
(13)
2
= 5
2
+ (F
2
)
2
F
2
= 12N
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