Two neutron stars are separated by a distance of `10^(10) m`. They each have a mass of `10^(30) kg` and a radius of `10^(5) m`. They are initially at rest with respect to each other.
As measured from the rest frame, how fast are they moving when
(a) their separation has decreaed to one - half its initial value,
(b) they are about to collide .

Two neutron stars are separated by a distance of 1.0 xx 10^11 m. They each have a mass of 1.0xx10^30 kg and a radius of 2.0 xx 10^5 m. They are initially at rest with respect to each other. As measured from that rest frame, how fast are they moving when (a) their separation has decreased to one-half its initial value and (b) they are about to collide ?

Two particles have equal masses of 5.0 g each and opposite charges of +4.0 xx10^(-5) C. They are released from rest with a separation of 1.0 m between them. Find the speeds of the particles when the separation is reducced to 50 cm.

Two particles have equal masses of 5.0 g each and opposite charges of +4.0 xx10^(-5) C. They are released from rest with a separation of 1.0 m between them. Find the speeds of the particles when the separation is reducced to 50 cm.

Two particles have equal masses of 5.0 g each and opposite charges of +4.0 xx10^(-5) C. They are released from rest with a separation of 1.0 m between them. Find the speeds of the particles when the separation is reducced to 50 cm.

Two parallel current carrying wires separated by distance 10 cm attract each other by force of 4xx10^(-4) N/m .If current in one wire is 10 A , then current in other wire is -

Two particles A and B are initially separated by a distance of 1.0 m and are at rest. The mass of A is 100 gm and that of B is 30.0 gm and they move under a constant mutual attractive force of 0.02 N .At what distance from the A's original position do the particles collide.

Two point objects of masses 10 g each carry charges of opposite nature with the same magnitude of 50 muC are held at rest at a separation of 2 m. Now the point objects are released from the state of rest. Calculate the speed acquired by both the objects when separation between them reduces to half of the initial value.

Two particles of mass m and M are initially at rest and infinitely separated from each other. Due to mutual interaction, they approach each other. Their relative velocity of approach at a separation d between them, is

Two cyclists move on two separate roads angle at 60^(@) to each other at the rate of 5m/s and 10m/s respectively. The rate which they are separating from each other is