Force, Motion & Gravity MCQs with Answers

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Hooke's law defines the elastic limit — the maximum extent to which a material can be stretched or deformed and still return to its original shape when the force is removed.

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Gas molecules in a container move randomly in all directions due to their high kinetic energy.

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The time period of a simple pendulum becomes double when its length is made four times.

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A hydraulic press works on the principle of Pascal's Law.

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The stability of a racing car is increased by lowering its centre of gravity.

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The force of attraction between two masses is given by Newton's Law of Gravitation.

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The relationship between stress and strain is described by Hooke's law, which states that stress is directly proportional to strain within the elastic limit.

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Rockets are used to put satellites into orbits because they provide the necessary thrust to overcome Earth's gravity and reach space.

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Steel is more elastic than rubber because the ratio of stress to strain is more, meaning it has a higher modulus of elasticity (Young's modulus).

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The dimensional formula of force is [M L T⁻²] because force equals mass times acceleration (F = ma).