Topic #1: Space Motion
Learning Goal #14: I can model the forces acting on an object in circular motion.
Assessment: Activity – Space Motion, Unit E Post-Test
What is an orbit?
- An orbit is the curved path an object takes around another object
- The moon orbits around the Earth
- The planets and space objects like asteroids and comets orbit around the sun
- Spacecraft like satellites and space stations orbit around Earth or other planets
- Some orbits are circular while others are elliptical (oval)
What is the difference between rotation and revolution?
- Rotation is spinning or turning around an axis
- Revolution is circling or orbiting around another object
What forces cause an object to move in a circle?
What characteristics affect the strength of gravitational force?
- Newton’s Law of Universal Gravitation states that all objects in the universe have gravity, and that the strength of gravitational attraction depends on two factors:
- The mass of each object
- The distance between the objects