gravitational field strength
G: defined as the gravitational force acting per unit mass on an object. This is different on other planets and the moon compared to on Earth.
Planet=Surface gravity (N/kg)
Mercury=4
Venus=9
Earth=10
Mars=4
Jupiter=26
Saturn=11
Uranus=11
Neptune=12
This means that a 1 kg mass experiences a force of 10N on Earth due to Earth's gravitational pull.
gravitational force:causes the planets to orbit the sun, the moon and artificial satellites to orbit the Earth and causes comets to orbit the sun.
The planets further away from the Sun travel more slowly because the further the distance away, the smaller the gravitational pull.
Larger masses give a stronger pull. Every object is surrounded by its own gravitational field, which exerts an attractive force on all objects. As the Earth is greater than the moon, it attracts the moon and causes it to orbit the Earth, and G on the moon is much smaller than on Earth.
Orbital speed= 2 x π x orbital radius / time period
Galaxy= a large collection of billions of stars
Universe=a large collection of billions of galaxies
G: defined as the gravitational force acting per unit mass on an object. This is different on other planets and the moon compared to on Earth.
Planet=Surface gravity (N/kg)
Mercury=4
Venus=9
Earth=10
Mars=4
Jupiter=26
Saturn=11
Uranus=11
Neptune=12
This means that a 1 kg mass experiences a force of 10N on Earth due to Earth's gravitational pull.
gravitational force:causes the planets to orbit the sun, the moon and artificial satellites to orbit the Earth and causes comets to orbit the sun.
The planets further away from the Sun travel more slowly because the further the distance away, the smaller the gravitational pull.
Larger masses give a stronger pull. Every object is surrounded by its own gravitational field, which exerts an attractive force on all objects. As the Earth is greater than the moon, it attracts the moon and causes it to orbit the Earth, and G on the moon is much smaller than on Earth.
Orbital speed= 2 x π x orbital radius / time period
Galaxy= a large collection of billions of stars
Universe=a large collection of billions of galaxies