Identify the force that propels a rocket.
1)The rocket is propelled by the reaction force of the exhaust gasses bouncing off the air molecules outside the rocket.
2)The rocket is propelled because the action force of the rocket on the exhaust gases is greater than the reaction force of the exhaust gasses on the rocket.
3)The rocket is propelled by the reaction force from the particles accelerated out the rear by an action force from the rocket.
4)The rocket is propelled because the action force of the rocket on the exhaust gases is less than than the reaction force of the exhaust gasses on the rocket.
3)The rocket is propelled by the reaction force from the particles accelerated out the rear by an action force from the rocket.
The correct answer is option 3) The rocket is propelled by the reaction force from the particles accelerated out the rear by an action force from the rocket.
The correct answer is option 3) The rocket is propelled by the reaction force from the particles accelerated out the rear by an action force from the rocket.
To understand why this is the correct answer, we can apply Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
In a rocket, the force that propels it forward is generated by the expulsion of exhaust gases from the rocket engine. When the rocket engine burns fuel, it releases high-pressure gases at high speeds through a nozzle at the rear of the rocket.
According to Newton's third law, as the exhaust gases are expelled with a certain force in one direction (action), an equal but opposite force is exerted on the rocket in the opposite direction (reaction). This reaction force propels the rocket forward.
Therefore, the force that propels a rocket is the reaction force generated by the particles accelerated out the rear by an action force from the rocket itself.