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A rigid body is rotating about an axis. Different particles are at different distances from the axis. Which of the following is true?A rigid body is rotating about an axis. Different particles are at different distances from the axis. Which of the following is true?

Different particles possess the same angular velocity and equal to the angular velocity of rigid body.

The angular velocity of the revolution of a planet around the sun increases. Why?

The angular velocity of the revolution of the planets around the sun increases and this can be explained using Kepler’s... View Article

A circus acrobat while performing spins brings his limbs closer to the body. Due to this

Answer: A circus acrobat while performing spins brings his limbs closer to the body. Due to this Angular Momentum is conserved... View Article

Choose the correct answer from the following

To form an enlarged image of an object in front of a convex lens, it should be placed _____. anywhere... View Article

Which of the following is not a unit of angular displacement?

A) Radians B) Degrees C) Metres D) Revolutions The correct option is C) Metres. Radians, degrees, and revolutions are the... View Article

The moment of inertia is given about an axis perpendicular to the plane of a circular disc. To find the moment of inertia about an axis along a diameter use the

use perpendicular axis theorem because diameter is perpendicular to the axis that is passing through the centre of the disc.

Which of the following relations is wrong? (1) Torque = Moment of inertia × Angular acceleration (2) Torque = Dipole moment × Magnetic induction (3) Moment of inertia = Torque × Angular acceleration (4) Linear momentum = Moment of inertia × Angular velocity

Answer: (3) Moment of inertia = Torque × Angular acceleration Net Torque is the product of moment of inertia and angular... View Article

Rolling motion is

Rolling motion is combination of rotatory and translatory motion.

Binding energy of a satellite is

The binding energy is the negative of the total energy of the satellite.

Kinetic Energy of a rotating body i.e. Rotational Kinetic Energy can be converted to various forms of energy they are

Rotational Kinetic Energy can be converted to Heat, Linear Kinetic Energy, and Potential Energy.

Gravitational Potential is:

Gravitational Potential is negative, scalar quantity, unit JKg-1. It is represented by the symbol V. The gravitational potential at a point... View Article

If a body in rest breaks up into two pieces of equal masses, then, the parts will

If a body in rest breaks up into two pieces of equal masses, then, the parts will move in opposite... View Article

A value of Reynold’s number _________ indicates turbulence.

Reynold’s number R > 2000 indicates turbulence.

Force of viscosity acting on a spherical body of radius r moving with velocity v through a fluid of viscosity η is given by

Force of viscosity acting on a spherical body of radius r moving with velocity v through a fluid of viscosity... View Article

The quantity which decides the nature of flow of a viscous liquid through a pipe is known as

The quantity which decide the nature of flow of a viscous liquid through a pipe is known as Reynold’s Number.

Direction of linear velocity of a particle rotating in a circular motion is :

Direction of linear velocity of a particle rotating in a circular motion is along the tangent.

From a waterfall, water is falling at the rate of 100 kg/s on the blades of a turbine. If the height of fall is 100 m, the power delivered to the turbine is

Power = work done / time taken or P = mgh / t P = (m/t) gh = 100 x... View Article

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