PHYS 183 Chapter Notes - Chapter 4: Tidal Locking, Big Bang, Tidal Acceleration
Document Summary
4. 1 describing motion: examples from daily life speed: tells us how fair something will go in a certain amount of time 100 km/hour. Velocity: tells us speed and direction 100 km/hour n. Gravity accelerates all objects by the same amount regardless of mass air resistance causes differences in acceleration of objects falling. Acceleration gravity: acceleration of a falling object; g = 9. 8 m/s2: on earth, it is 9. 8 metres/second, happens each second so after 2 seconds it is 20 m/s. Presence of force doesn"t always change momentum air resistance and friction doesn"t affect car if you maintain a constant velocity and therefore a constant momentum some forces always present gravity, electromagnetic forces. When an object accelerates, a none-zero amount of net force must be causing the acceleration. Planets are always acceleration as they orbit the sun because their direction of travel constantly changes as they go around their orbits some force is causing the acceleration.
