Blog categorized as Gravitation

Q- Neutron stars are extremely dense objects with a mass comparable to the mass of the sun but a radius of only several thousand meters. Consider a neutron star of mass M = 1.99*10³⁰ kg and a radius of R = 10.2 km.

(a) What is the gravitational acceleration near the surface of the star?

(b) If an...

Q- A cosmic body is approaching to the earth with velocity v₀ and the perpendicular distance of the centre of the earth from the line of motion of the cosmic body when it is in free space (aiming parameter) is l. Find the minimum distance of the body from the centre of earth if it passes through the...

Q- A satellite of the Earth is moving in a circular orbit of radius R. By what fraction its velocity v be increased for the satellite to be in an elliptical orbit with minimum distance from the Earth equal to R and maximum distance from the Earth equal to 2R? 

Solution: