PART - 1 CH - 5Work, Energy and Power — Physics STD 11 Science — Question

At which point in the trajectory will the speed be maximum?

Name an experimental evidence in support of random motion of gas molecules.

When two soap bubbles stay in contact, what is the radius of the interface?

When do we say that a floating body is in stable equilibrium?

If the motion of the earth is taken to be in orbits around the sun, then can the earth be considered a point body? Why?

Textbooks on science may give you a wrong impression that studying science is dry and all too serious and that scientists are absent-minded introverts who never laugh or grin. This image of science and scientists is patently false. Scientists, like any other group of humans, have their share of humorists, and many have led their lives with a great sense of fun and adventure, even as they seriously pursued their scientific work. Two great physicists of this genre are Gamow and Feynman. You will enjoy reading their books listed in the Bibliography.

Does the escape velocity vary with mass?

Why should the difference between the frequencies be less than ten to produce beats?

If the earth's satellite is put into an orbit at a height where resistance due to atmosphere cannot be neglected, how will motion of satellite be affected?

Which of the following examples represent periodic motion? A swimmer completing one (return) trip from one bank of a river to the other and back.