IGNOU BPHET 141 2026 - A particle moves with speed 0.8c. Calculate its momentum, kinetic ener

Question

A particle moves with speed 0.8c. Calculate its momentum, kinetic energy and total energy.

19 Jan 2026

Answer :

Word Count : 154

The particle has speed (v = 0.8c). The relativistic formulas are: [ \gamma = \frac{1}{\sqrt{1 - v^2/c^2}}, \quad p = \gamma m v, \quad K = (\gamma - 1) m c^2, \quad E = \gamma m c^2 ] Step 1: Calculate (\gamma). [ v^2/c^2 = (0.8)^2 = 0.64 ] [ 1 -

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