Particle is point like object with dimension.

A plane has three dimensions.

Obtain the general expression of centre of mass for distributed n particles of system in three dimension.

Assertion:- At point P object is speeding down. Reason:- If acceleration is positive, object must speed up. .

The diameter of the pupil of human eye is 2.5 mm. Assuming the wavelength of light used is 5000 Å. What must be the minimum distance between two point like objects to be seen clearly if they are at a distance of 5 m from the eye ?

Obtainwork energy theorem of a particle moving in one dimension under the variable force .

A convex mirror and convex lens of radius of curvature 20 cm are placed on same axis with 30 cm separation. A point-like object is placed at 20 cm from convex lens and its image by this combination is obtained at object. What will be focal length of convex lens ?

Two point like objects each with mass m are connected by a massless rope of length l the object are suspended vertically near the surface of earth, so that one object hanging below the other then the objects are relased. Show that the tension in the rope is T=(GMml)/(R^(3)) where M is the mass of the earth and R is its radius |l lt lt R|

The velocity of fluid particle at a point on streamline in which direction it obtain ?