An astronaut in a space suit is motionless in outer space. The propulsion unit strapped to her back ejects some gas with a velocity of 50 m/s. The astronaut recoils with a velocity of 1.0 m/s. If the mass of the astronaut and space suit after the gas is ejected is 120 kg, the mass of the gas ejected is
1.0 kg.
1.9 kg.
2.4 kg.
3.00 kg.
As we dicussed in
Elastic Collision in 2 dimension -
- wherein
Velocity of the gas is
Mass of astronaut = 120 kg
MV=mv
Option 1)
1.0 kg.
Incorrect
Option 2)
1.9 kg.
Incorrect
Option 3)
2.4 kg.
Correct
Option 4)
3.00 kg.
Incorrect