question_answer 23)

                A star 2-5 times the mass of the sun and collapsed to a size of the 12 km rotates with a speed of 15 rev. per second. (Extremely compact stars of this kind are known as neutron stars. Certain observed steller objects called pulsars are believed to belong this category). Will an object placed on its equator remain struck to its surface due to gravity ? (Mass of the sun ).  

Answer:

The object will remain struck to the surface of star due to gravity, if the acceleration due to gravity is more than the centrifugal acceleration due to its rotation. Acceleration due to gravity, Centrifugal accelerationSince, g > therefore the body will remain struck with the surface of star.