Units and Measurements — Physics STD 11 Science — Question

If all the particles of a system lie in X-Y plane, is it necessary that the centre of mass be in X-Y plane?

A block of known mass is suspended from a fixed support through a light spring. Can you find the time period of vertical oscillation only by measuring the extension of the spring, when the block is in equilibrium?

At what inclination should a player throw the ball from horizontal so that the ball travels the maximum distance?

Name the principle used in the mercury thermometer.

When a particle moves with constant velocity, its average velocity, its instantaneous velocity and its speed are all equal. Comment on this statement.

What is the relationship between the total energy and oscillation frequency of a simple pendulum?

State the number of significant figures in the following:

0.2370g cm^-3

Define displacement of a particle.

Define moment of inertia and give its SI unit.