Lakhmir Singh and Manjit Kaur Solutions for Chapter: Force and Laws of Motion, Exercise 6: Very Short Answer Type Questions

Name the physical quantity whose unit is 'newton'.

Which physical principle is involved in the working of a jet aeroplane?

Name the principle on which a rocket works.

Is the following statement true or false. A rocket can propel itself in a vacuum. Explain.

What is the force which produces an acceleration of $1 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.$ in a body of mass $1 \mathrm{kg}$?

Find the acceleration produced by a force of $5 \mathrm{N}$ acting on a mass of $10 \mathrm{kg}$.

A girl weighing $25 \mathrm{kg}$ stands on the floor. She exerts downward force of $250 \mathrm{N}$ on the floor. What force does the floor exert on her?

Name the physical quantity, which makes it easier to accelerate a small car than a large car.