Answer:
the mass of the neutron stars is 2.02 × 10₂₅kg
Explanation:
The neutron stars rotate in the orbit of radius 40km
The centripetal force that acts on the neutron star is
The gravitational force between the neutron stars and the earth is
For a circular rotating object , the relation between the linear velocity and angular velocity is
substitute for v in equation ans solve for M
angular velocity, = 0.73rev/sec = 4.587rad/sec
The distance from the neutron stars to the centre of the earth is
r = 40km = 40 × 10³m
gravitational constant, G =6.67 × 10⁻¹¹Nm²/kg²
Calculate the mass of neutron star by using the equation
Therefore, the mass of the neutron stars is 2.02 × 10₂₅kg