Force, Motion & Gravity MCQs with Answers

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Hooke's law is expressed as Fs = -kx, where the negative sign indicates that the restoring force acts in the direction opposite to the displacement.

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A pair of unlike parallel forces having different lines of force produce a couple.

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When a body is in equilibrium, its acceleration is zero because the net force acting on it is zero.

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Pressure increases when the area of contact is decreased, because pressure is inversely proportional to area for a given force.

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Blotting paper absorbs liquid through capillary action, the movement of liquid within narrow spaces without the assistance of external forces like gravity.

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A hydrogen-filled balloon rises because the weight of hydrogen is less than the weight of the air it displaces, creating an upward buoyant force.

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The distance covered by a free falling body after 10 seconds is 500 m, calculated using the equation s = (1/2)gt².

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The floating of a ship is based on Archimedes Principle, which states that a body immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.

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The drag force experienced by a spherical object moving through a viscous fluid is given by Stokes law.

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A lever consists of three main parts: the Load (resistance to be overcome), the Effort (applied force), and the Fulcrum (fixed pivot point).