A 4000 kg rocket accelerates upward at 5 m/s² while ejecting gas at 80 kg/s with speed 120 m/s relative to the rocket. W
Given: A 4000 kg rocket accelerates upward at 5 m/s² while ejecting gas at 80 kg/s with speed 120 m/s relative to the rocket. What is the total thrust? (Take g = 10 m/s² ) Formula: Thrust from gas ejection: T_{gas = dm/dt × v_{rel = 80 × 120 = 9600 N. Substitution & Calculation: Total thrust must provide net force plus overcome gravity. Net force: F_{net = ma = 4000 × 5 = 20000 N . Weight: mg = 4000 × 10 = 40000 N . Total thrust: T_{total - mg = ma Rightarrow T_{total - 40000 = 20000 . T_{total = 40000 + 20000 = 60000 N . The 9600 N contributes, but total thrust accounts for all upwar
Ref: NCERT Physics Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII, continuing as per NCERT advisory for 2026-27),Topic: Fundamental laws, definitions and applications as per latest NCERT. The section explains governing laws, formulas like μ₀ = 4π.
