Concepts Of Physics MCQ Edition [Volume 2]PhysicsThe Special Theory of Relativity

When the speed of a particle increases, its rest mass

Options

Aincreases
Bremains the same
Cdecreases
Dvaries

Correct answer

B. remains the same

Step-by-step solution

The rest mass of a particle is an intrinsic property and is independent of its speed or the frame of reference. While the relativistic mass of a particle increases with speed according to the relation m = m₀ 1 - v^2 c^2 , its rest mass m₀ remains constant. Therefore, when the speed of a particle increases, its rest mass remains the same.

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