Three particales `P,Q` and `R` are placedd as per given Masses of `P,Q` and `R` are `sqrt3 m sqrt3m` and m respectively The gravitational force on a fourth particle 'S' of mass m is equal to
.

A mass m is placed at point P lies on the axis of a ring of mass M and radius R at a distance R from its centre. The gravitational force on mass M is

A mass m is placed at point P lies on the axis of a ring of mass M and radius R at a distance R from its centre. The gravitational force on mass m is

Two spherical planets P and Q have the same uniform density rho, masses M_p and M_Q and surface areas A and 4A respectively. A spherical planet R also has uniform density rho and its mass is (M_P + M_Q). The escape velocities from the plantes P,Q and R are V_P V_Q and V_R respectively. Then

Two spherical planets P and Q have the same uniform density rho, masses M_p and M_Q and surface areas A and 4A respectively. A spherical planet R also has uniform density rho and its mass is (M_P + M_Q). The escape velocities from the plantes P,Q and R are V_P V_Q and V_R respectively. Then

A particle of mass m is located inside a spherical shell of mass M and radius R. The gravitational force of attraction between them is

Two particles P and Q each of mass 3m lie at rest on the X-axis at point (-a,0) and (+a,0) respectively. A third particle R of mass 2m intially at the origin moves towards the particle Q. IF all the collisions of the system of 3 particles are elastic and head on, the total number of collisions in the system is

G.M of P,Q,R is…..

Two concentric shells of masses M_(1) and M_(2) are concentric as shown. Calculate the gravitational force on m due to M_(1) at points P,Q and R .

Two concentric shells of masses M_(1) and M_(2) are concentric as shown. Calculate the gravitational force on m due to M_(1) at points P,Q and R .