Eventually, if velocity is high enough, cannonball will escape from earth’s gravity
- Eventually, if velocity is high enough, cannonball will escape from earth’s gravity
- head into other parts of the solar system
- orbits are either parabolas (just barely escaping) or hyperbolas
- Escape velocity given by law of Conservation of Energy
- There is no free lunch for energy
- two types of energy here
- the energy of motion, called kinetic energy
- this energy causes damage in car wrecks
- the energy of gravity, called potential energy
- this energy is used to create electricity at Niagra Falls
- used by skiers to create speed and thrills
- demo with ball. Throw ball up wards.