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System of Particles and Rotational Motion
The working principle of a ball point pen is
Bernoulli's theorem
surface tension
gravity
viscosity
B.
surface tension
The principle of working of ball pen corresponds to surface tension. As the pen moves along the paper, the ball rotates picking up ink from the ink cartridge and leaving it on the paper.
Sponsor Area
Angular momentum of the particle rotating with a central force is constant due to
Four point masses, each of value m, are placed at the corners of a square ABCD of side A. The moment of inertia through A and parallel to BD is
Sponsor Area
Sponsor Area