Three masses are placed on the x-axis : `300 g` at origin. `500 g` at `x = 40 cm` and `400 g` at `x = 70 cm`. The distance of the centre of mass from the origin is.

A large number of particles are placed around the origin each at a distance R from the origin. The distance of the centre of mass of the system from the origin is

For a group of particles of different masses,if all the masses are placed at different points at equal distance R from the origin, then the distance of the centre of mass from the origin will be

A non–uniform thin rod of length L is placed along x-axis as such its one of ends at the origin. The linear mass density of rod is lambda=lambda_(0)x . The distance of centre of mass of rod from the origin is :

A non–uniform thin rod of length L is placed along x-axis as such its one of ends at the origin. The linear mass density of rod is lambda=lambda_(0)x . The distance of centre of mass of rod from the origin is :

Two particles each of mass 1 g are placed at distance of 1 m and 3 m respectively from the origin along x-axis. The centre of mass of the system from the origin is

When 'n' number of particles of masses m are at distances x_1 =a, x_2 =ar, x_3=ar^2…x_n = ar^n ,units from origin on the X-axis, then find the distance of centre of mass of the system from origin.