System of Parti...

In case of torque of a couple, if the axis is changed by displacing it parallel to itself, torque will

Two particles of mass 1 kg and 0.5 kg are moving in the same direction with speed of 2 m/s and 6 m/s respectively on a smooth horizontal surface. The speed of centre of mass of the system is

The passengers in a boat are not allowed to stand because: 

Three identical uniform rods, each of length l, are joined to form a rigid equilateral triangle. Its radius of gyration about an axis passing through a corner and perpendicular to the plane of the triangle is.

Moment of inertia of thin uniform rod of length $$\displaystyle l$$ is equal to: 

Find the radius of gyration of a hollow uniform sphere of radius R about its tangent.

A uniform disc of mass M and radius R is mounted on an axle supported in friction less bearings. A light cord is wrapped around the rim of the disc and a steady downward pull T is exerted on the cord. The angular acceleration of the disc is:

The momentum of a body of mass $$0.5$$ kg dropped from a certain height (h), when reaches the ground is $$10$$ N s. The value h is ___ m. ( g$$\displaystyle {= 10\ ms }^{ -2 }$$)

A body of mass 100 g is moving with a velocity of 15 m/s. The momentum associated with the ball will be :

If a body of mass M collides against a wall with velocity V and rebounds with the same speed, then its change of momentum will be