If momentum decreases by 20%, kinetic energy will decrease by 36%. This is because kinetic energy (KE) is proportional to the square of momentum (P²) since KE=p²/2m.When momentum decreases by 20%, it becomes 0.8p, and the new kinetic energy becomes (0.8p)² = 0.64p², resulting in a 36% decrease (1 - 0.64 = 0.36).
If momentum decreases by 20% kinetic energy will decrease _____?
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Question context
This question is part of ⚙️ Mechanical Eng within the broader 🛠️ Engineering Essentials subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.