1.

Track `OABCD` (as shown is figure) is smooth and fixed in vertical plane. What minimum speed has to be given to a particle lying at point `A`, so that it can reach point `C`? A. `60m//s`B. `100m//s`C. `70m//s`D. `80m//s`

Answer» Correct Answer - D
Apply work energy theorem between point `A` & `B` we will get
`v=sqrt(2gh)=sqrt(2xx10xx320)=80m//s`


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