A) \[\operatorname{H}={{h}_{1}}+{{h}_{2}}\]
B) \[\operatorname{H}={{h}_{1}}-{{h}_{2}}\]
C) \[\operatorname{H}=\sqrt{{{h}_{1}}{{h}_{2}}}\]
D) None
Correct Answer: A
Solution :
Mass of car = 100kg Radius of track = 20m Friction force provides the necessary centripetal force \[{{\operatorname{f}}_{r}}={{f}_{c}}\] \[\mu mg~=\frac{{{\operatorname{mv}}^{2}}}{\operatorname{r}}\] \[\operatorname{v}=\sqrt{\mu \operatorname{r}\operatorname{g}}\] \[\operatorname{v}=\sqrt{0.64\times 20\times 10}=11.28m/s\]You need to login to perform this action.
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