RRB NTPC & Group D Physics Mock Test — Mechanics Set 2

Practice 25 free MCQ on Mechanics (Physics) for RRB NTPC, RRB Group D & Railway exams. Covers Newton's Laws, Force, Energy, Momentum, Friction, Circular Motion, Projectile Motion, Torque, Springs & Fluid Mechanics — with 12-min timer, instant score & explanations in English, Hindi, Bengali & Nepali.

⚙️ Newton's Laws💥 Force & Motion⚡ Kinetic Energy🏔️ Potential Energy💫 Momentum🔄 Circular Motion🎯 Projectile Motion🔩 Friction🌊 Bernoulli's Theorem🔁 Reynolds Number

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Mechanics Mock Test — Set 2

Physics · RRB NTPC & Group D · 25 Questions · 12 Min

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Frequently Asked Questions — Mechanics & Physics

What is Newton's Second Law of Motion?

Newton's Second Law: F = ma. Force = mass × acceleration. A 5 kg object with 4 m/s² acceleration → F = 20 N. Most tested mechanics formula in RRB NTPC & Group D.

What is the difference between kinetic energy and potential energy?

KE = ½mv² (energy of motion). PE = mgh (stored energy due to height). A 2 kg ball at 4 m/s has KE = 16 J. Same ball at 10 m height has PE = 200 J.

Does friction depend on the area of contact?

No. Friction f = μN depends only on coefficient of friction and normal force. It is independent of contact area — most commonly tested concept in RRB physics.

At what angle is the range of a projectile maximum?

Range is maximum at 45°. R = v²sin(2θ)/g, maximum when θ = 45°. Ranges at 30° and 60° are equal but less than at 45°.

মেকানিক্সে কোন সূত্রগুলো RRB NTPC-তে বেশি আসে?

সবচেয়ে বেশি আসে: F = ma, KE = ½mv², PE = mgh, p = mv, f = μN, v = ωr, τ = F×r।

यांत्रिकी में कौन से टॉपिक्स RRB Group D में पूछे जाते हैं?

मुख्य टॉपिक्स: न्यूटन के नियम (F=ma), KE=½mv², PE=mgh, संवेग (p=mv), घर्षण (f=μN), लीवर MA, वृत्तीय गति (v=ωr), प्रक्षेप्य गति (45°), बर्नौली, रेनॉल्ड्स संख्या।

What is the Reynolds number in fluid mechanics?

Re = ρvL/μ. Re < 2000 → laminar flow; Re > 4000 → turbulent flow. Named after Osborne Reynolds (1883).