Laws of Motion ...

A rocket is propelled by a gas which is initially at a temperature of $$4000 \ K$$. The temperature of the gas falls to $$1000 \ K$$ as it leaves the exhaust nozzle. The gas which will acquire the largest momentum
while leaving the nozzle is

What is product of force and the time for which force act called?

What is the momentum of an object of mass m, moving with a velocity $$V$$ ?

Two forces are acting on an object. Which of the following statements is correct?

An ice cube has been given a push and slides without friction on a level table. Which is correct?

Answer the question:
The diagram shows a uniform beam being used as a balance. The beam is pivoted at its centre.
A $$1.0\,N$$ weight is attached to one end of them. An empty pan weighing $$0.2\,N$$ is attached to the other end of beam.
How many $$0.1\,N$$ weights must be placed on the pan in order to balance the beam ?

A uniform ladder of length $$5  m$$ is placed against the wall as shown in the figure. If coefficient of friction $$\mu $$ is the same for both the walls, what is the minimum value of $$\mu $$ for it not to slip ?

A vehicle is moving with a speed $$v$$ on a curved smooth road of width $$b$$ and radius $$R$$. For counteracting the centrifugal force on the vehicle, the difference in elevation required in between the outer and inner edges of the road is 

An elastic string carrying a body of mass $$m$$ at one end extends by $$1.5\ cm$$. If the body rotates in vertical circle with critical velocity, the extension in the string at the lowest position is:

The stick $$OA$$ rotates about a horizontal axis through $$O$$ with a constant counter clockwise velocity $$\omega =3$$ rad/sec. As it passes through the position $$\theta =0^{0},$$ a small mass $$m$$ is placed upon it at a radial distance $$r=0.5\ m$$. If the mass is observed to be slipping when $$\theta = 37^{o}$$ , then $$\mu$$ is :