Question

Track OABCD (as shown in figure ) is smooth. What minimum speed has to be given to a particle lying at point A, so that it can reach point C? (take `g=10 m//s^2`)

A. 60 m/s
B. 100 m/s
C. 70 m/s
D. 80m/s

Answer 1

Correct Answer - D
Minimum speed is required to enable the particle to reach at B.By energy conservation
`1/2 mv^(2) =mgh`.
By putting values v =80 m/s