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A particle starts from rest and moves with constant acceleration 4 m/s². Its displacement after 5 s is A 20 m B 25 m C 50 m D 62.5 m Explanation Using s = ut + ½at² with u = 0, a = 4 m/s² and t = 5 s gives s = 0.5×4×25 =…

The quantity having only magnitude and no direction is called A Vector B Scalar C Tensor D Phasor Explanation Scalar has magnitude only. The S.I. unit of power is A Joule B Watt C Newton D Volt Explanation Power = work/time. Work done is zero when the angle between force and displacement is A 0°…

The slope of a displacement–time graph gives A Acceleration B Velocity C Jerk D Force Explanation Velocity is rate of change of displacement with time. A body moves in a circle with constant speed, then A Velocity is constant B Acceleration is zero C Only direction changes D Kinetic energy is zero Explanation In uniform…