How are stars and gravity related?

Answer 1

The forces of gravity between two masses are always forces of attraction.

As far as we know now, gravity always draws the two masses towards each

other, and never pushes them apart.

Answer 2

The formula for gravity is based on three things: the product of the mass of the two objects concerned, divided by the square of the distance between them, all multiplied by the garvitational constant G.

Basically, the more mass something has, the larger its force of gravity will be on another mass; an increase in one mass proportionally increases the force.

Answer 3

you need a satellite of mass 10 000 kg to orbit radius 10 000 000 metres from earths centre, the gravitational force (f) on the satellite is :

.

f = (G *earth mass* 10 000) / 10 000 000^2 = 39 860 newtons

.

there is only one orbital velocity at this radius that will cause a balancing centripetal force, this is given by:

.

v = square root (( 39 860 *10 000 000 ) / 10 000)

then v = 6313.48 metres / second at this orbit for balancing force

Answer 4

Stars are massive celestial bodies that emit light and heat due to nuclear fusion reactions in their cores. Gravity is the force that holds stars together by pulling matter towards their center, creating the necessary conditions for fusion to occur. The gravitational contraction of a star's core generates the pressure and temperature needed for nuclear fusion to sustain the star's energy output.

Answer 5

A star has mass; anything that has mass exerts a gravitational attraction.