A) \[\frac{2\sqrt{\mathrm{R}}}{\sqrt{\mathrm{g}}\,\mathrm{cos}\,\theta }\]
B) \[\frac{2\sqrt{\mathrm{R}}\,\mathrm{cos}\,\theta }{\mathrm{g}\,}\]
C) \[2\sqrt{\frac{\mathrm{R}}{\mathrm{g}\,}}\]
D) \[\frac{\sqrt{\operatorname{gR}}}{\cos \,\theta \,}\]
Correct Answer: C
Solution :
\[\frac{PR}{2R}=cos\,\,\theta \] \[PR=2\operatorname{R}\,\,cos\,\,\theta \] ?.(1) \[a=g\,\,cos\,\,\theta \] \[PR=\frac{1}{2}g\,\,cos\,\,\theta \,\,{{\operatorname{t}}^{2}}\] ?.(2) \[2R\,\,cos\,\theta =\frac{1}{2}g\,\,cos\,\theta \,\,{{\operatorname{t}}^{2}}\Rightarrow \operatorname{t}=2\sqrt{\frac{R}{g}}\]You need to login to perform this action.
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