Chapter 3 Flashcards
What is gravity
Gravity is the force that causes all objects to pull on other objects everywhere
What is gravity’s affect on astronomical motion
It is the reason planets move on the path they do, and affects their speed and direction
Who first studied the properties of gravity and wrote the equations of gravity induced motion
Newton
What is newtons law of universal gravity?
Everything attracts everything else
What is keplers modified third law used for
It is used to calculate the mass of large celestial objects
What is surface gravity
Surface gravity is the acceleration a mass experiences on the surface of a celestial object
What does surface gravity influence
Determines the weight of a mass at a celestial objects surface, the shape of celestial objects, and determines if the celestial object has an atmosphere or not
What law determines surface gravity
Newton’s second law
What is escape velocity
Escape velocity is the force and speed needed of an object to escape the gravitational pull of a celestial object
What law determines escape velocity
Newtons law of motion
