Rocket:
A rocket is a spacecraft, aircraft,
vehicle or projectile that obtains thrust from a rocket engine. Rocket engine
exhaust is formed entirely from propellant carried within the rocket.
Rockets carry
fuel that is burned in the presence of ………
a) nitrogen
b) oxygen
c) hydrogen
d) carbon dioxide
As fuel burns in rocket in the presence of oxygen, it release hot……..
a) water
b)vapours
c) gases
d) all of these
Which of the following propel the rocket in upward direction?
a) hot water
b)vapours
c) hotgases
d) all of these
The pressure bottle rocket works according to which of the following law?
a) Newton’s 1st law
b) Newton’s 2nd law
c) Newton’s 3rd law
d) Ohm’s law
Explanation:Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
As you pump up your pressure rocket, it expels water in the bottle downward. This is the…………..
a) action
b) reaction
c) hydraulic pressure
d) none of these
