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Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 1 > Chapter 4 - Motion in Plane > Two inclined planes `OA` and `OB` of inclinations `alpha` and `beta` equal to `30 degree` are as shown in the figure. A particle is projected at an angle of `90 degree` with plane `OA` from point `A` and it strikes the plane `OB` at point `B` normally. Then find the speed of projection `u` in m/s. (Given that `OA = OB = 20cm` and `g = 10m/s^(2)`)

Two inclined planes `OA` and `OB` of inclinations `alpha` and `beta` equal to `30 degree` are as shown in the figure. A particle is projected at an angle of `90 degree` with plane `OA` from point `A` and it strikes the plane `OB` at point `B` normally. Then find the speed of projection `u` in m/s. (Given that `OA = OB = 20cm` and `g = 10m/s^(2)`)

40m) ? Take g = 10 m/s^2 With what minimum speed must a particle be projected from origin so that it is able to pass through a given point (30m