A) \[45{}^\circ \]
B) \[60{}^\circ \]
C) \[90{}^\circ \]
D) \[120{}^\circ \]
Correct Answer: C
Solution :
: Resultant force \[=17\text{ }N\] \[\therefore \] \[{{R}^{2}}-{{P}^{2}}+{{Q}^{2}}+2PQcos\theta \] or \[{{(17)}^{2}}={{(8)}^{2}}+{{(15)}^{2}}+2.PQcos\theta \] or \[289=64+225+2PQcos\theta \] or \[\cos \theta =0\] or \[\theta =90{}^\circ \]You need to login to perform this action.
You will be redirected in
3 sec