ROCKET AND PROPULSION

Acceleration does not depend on the exhaust velocity, burning of the fuel, and mass of the rocket.

• TRUE

• FALSE

Answer explanation

This statement is false because acceleration depends on exhaust velocity, burning of the fuel, and also the mass of the rocket.

If the mass of the rocket decreases, acceleration will .

(a)  

• Increase

• Decrease

Answer explanation

If the mass of the rocket decreases, the acceleration increases greater.

If the fuel in the rocket is burned slower, then the acceleration is greater.

• True

• False

Answer explanation

This statement is false because when the rocket’s fuel burns faster, the acceleration increases, according to factors that affect it.

Which physic principle explain all propulsion of rockets

• Pressure

• Newton's Third Law

• Newton's First Law

• Newton's Second Law

Answer explanation

The propulsion of all rockets is explained by the same physical principle: Newton's third law of motion.

​ ​ '​---- is nothing but the force by which a planet or other body draws objects toward its centre '

• Gravity

• Pressure

• Momentum

• Centrepetal force

Answer explanation

Gravity

In a rocket engine, fuel and a source of oxygen, called an oxidizer, are mixed and exploded in a combustion chamber. The combustion produces hot exhaust, which is passed through a nozzle to accelerate the flow and produce _______.

• oxygen

• power

• force

• thrust

Answer explanation

In a rocket engine, fuel and a source of oxygen, called an oxidizer, are mixed and exploded in a combustion chamber. The combustion produces hot exhaust, which is passed through a nozzle to accelerate the flow and produce thrust.