Particle of masses `m, 2m,3m,…,nm` grams are placed on the same line at distance `l,2l,3l,…..,nl cm` from a fixed point. The distance of centre of mass of the particles from the fixed point in centimeters is :

Two point masses m and M are separated bya distance L . The distance of the centre of mass of the system from m is

When 'n' number of particles of masses m, 2m, 3m,….nm are at distances x_1 =1, x_2 =2, x_3=3…x_n = n units respectively from origin on the X-axis, then find the distance of centre of mass of the system from origin.

When 'n' number of particles of masses m, 2m, 3m,….nm are at distances x_1 =1, x_2 =4, x_3=9…x_n = n^2 units respectively from origin on the X-axis, then find the distance of centre of mass of the system from origin.

A particle of mass 100 gm and charge 2muC is released from a distance of 50 cm from a fixed charge of 5muC . Find the speed of the particle when its distance from the fixed charge becomes 3 m.

A particle of mass 100 gm and charge 2muC is released from a distance of 50 cm from a fixed charge of 5muC . Find the speed of the particle when its distance from the fixed charge becomes 3 m.

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

Two uniform thin rods each of length L and mass m are joined as shown in the figure. Find the distance of centre of mass the system from point O

Two points masses of 2 kg and 3 kg lie at 5 m and 9 m away from origin O respectively. Find out the distance of centre of mass of these point masses from the origin.