Question

When the fuel in the rocket burns, the rocket moves vertically upward due to :

• A. the exhaust gases escape through the nozzle opposite to the earth and pushes downwards
• B. the exhaust gases escape through the nozzle opposite to the earth and pushes upwards
• C. the exhaust gases escape through the nozzle towards the earth and pushes downwards
• D. the exhaust gases escape through the nozzle towards the earth and pushes upwards

Answer 1

The correct option is D the exhaust gases escape through the nozzle towards the earth and pushes upwards

We know that by newton's third law of motion, Every action has an equal and opposite reaction. So as the fuel burns it escapes from the nozzle towards the earth. So the gases exert an equal and opposite force on the rocket. So this propels the rocket vertically upward.