A) \[30{}^\circ \]
B) \[40{}^\circ \]
C) \[120{}^\circ \]
D) \[90{}^\circ \]
Correct Answer: C
Solution :
[c] \[{{\vec{F}}_{m}}\bot \vec{v}\therefore \theta =90{}^\circ +30{}^\circ =120{}^\circ \]
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