All pages0 2-25)NAMEBPKIHS Model Entrance Exam SeL KA unitless physical quantitya) may have non zero dimensionsb) must have non zero dimensionsc) never has non zero dimensionsd) never existsThree vectors A, B and C are such that AB = 0 and Ā.C = 0. Then vector A is parallel toa) Bb) ČC) À × Bd) B × ČA river is flowing from West to East at speed of 5m/min. A man on the South bank of theriver capable of swimming at 10m/min in still water wants to cross the river in shortestpossible time. In what direction should he swim?a) Due Northb) At an angle 30° West of Northc) At an angle 30° East of Northd) At 60° West of NorthThe path of one projectile as seen by an observer on another projectile isa) straight line b) parabolicc) helicald) hyperbolic5. Even if the force on the rocket remains same, its accelerationa) increasesb) decreasesc) remains same>d) first increases and then decreases6. In conservative force fields, at equilibrium, potential energya) must be maximumb) must be minimumBxc266000B CSOУсо gxce​