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Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 1 > Chapter 4 - Motion in Plane > Two particles A and B projected simultaneously from a point situated on a horizontal place. The particle A is projected vertically up with a velcity vA while the particle B is projected up at an angle 30∘ with horizontal with velocity vB. After 5s the particles were observed moving mutually perpendicular to each other. The velocity of projection of the particle vA and vB respectively are:

Two particles A and B projected simultaneously from a point situated on a horizontal place. The particle A is projected vertically up with a velcity vA while the particle B is projected up at an angle 30∘ with horizontal with velocity vB. After 5s the particles were observed moving mutually perpendicular to each other. The velocity of projection of the particle vA and vB respectively are:

A very broad elevator is going up vertically with a constant acceleration of 2m/s^2. At the instant when its velocity is 4m/s a ball is projected from the floor of the lift with a speed of 4m/s relative to the floor at an elevation of 30^o. The time taken by the ball to return the floor is (g = 10m/s^2 )