state gov BSSC Laboratory Assistant Mock Test Series 2025 Physics Center of Mass and Linear Momentum Conservation of Linear Momentum
At a certain instant of time the mass of a rocket going up vertically is \(100\) kg. If it is ejecting \(5\) kg of gas per second at a speed of \(400\) m/s, the acceleration of the rocket would be (taking \(g=10m/s^2\))
1
\(20m/s^2\)
2
\(10m/s^2\)
3
2m/s2
4
1m/s2