Work & Energy MCQs with Answers

One-liner

Petroleum is the richest source of energy among common fuels because it has the highest energy density per unit mass.

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Work and Energy have the same dimensional formula, [ML²T⁻²], because energy is defined as the capacity to do work.

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The SI unit of work or energy is the Joule (J).

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A gas-filled balloon possesses potential energy due to the stretched elastic material and the compressed gas inside it.

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In rotational motion, work done is the product of torque and angular displacement, i.e., W = τ × dθ.

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Electron Volt (eV) is a unit of energy, defined as the energy gained by an electron when accelerated through a potential difference of one volt.

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Bernoulli's equation is obtained by applying the law of conservation of energy to a flowing fluid.

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When the velocity of an object is doubled, its kinetic energy becomes four times the original.

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Nuclear energy is the energy inside each atom, stored in the nucleus and released through fission or fusion reactions.

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When a force of 1 Newton displaces a body by 1 metre in the direction of the force, the work done is 1 Joule (1 J).