Forces and Laws...

Choose the correct statement from the following:
Weightlessness of an astronaut moving in a satellite is a situation of

Rocket propulsion theory is analogues to-

A bullet weighing $$50$$ gram leaves the gun with a velocity of $$30m/s$$.the ratio of their momentum is:

A truck is moving on a frictionless surface with uniform velocity of $$10\,m{s^{ - 1}}$$. A leak occurs in the water tank of the truck at the rate of $$2\,{kg^{ - 1}}$$. What is the speed of truck after $$50 \ s$$, if the mass of truck is $$100\,kg$$ and mass of water in the truck initially was $$100\,kg$$?

Principle of rocket is based on Newton's $$..........$$ law of motion.

A force of $$50\ N$$ is required to push a car on a level road with constant speed of $$10\ ms^{-1}$$. The mass of the car is $$500\ kg$$. What forces should be applied to make the car accelerate at $$1\ ms^{-2}$$.

An object maintains its motion under the continuous application of ________force

What happens when some children try to push a box on a rough floor?

Which of the following uses the principle of conservation of momentum?

What is the action reaction pair when we walk on the floor?