A) \[0{}^\circ \]
B) \[30{}^\circ \]
C) \[60{}^\circ \]
D) \[90{}^\circ \]
Correct Answer: C
Solution :
\[W=Fs\cos \theta \]Þ \[\cos \theta =\frac{W}{Fs}=\frac{25}{50}=\frac{1}{2}\] Þ \[\theta =60{}^\circ \]
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