ASTRO-110 Lecture Notes - Lecture 3: Kinetic Energy, Conservation Law
18 Sep 2020
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Matter is material such as rocks, water, and air. Energy is what makes matter move. Speed rate at which an object moves (the distance traveled per unit time) Velocity an objects speed in a certain direction (10 m/s moving east) Acceleration a change in an object"s velocity (a change in either speed or direction is an acceleration) [m/s2] The acceleration die to earth"s gravity is 10 m/s per second (really 9. 8 m/s2) each second or g = 10 m/s2. The greater the height from which you drop the ball, the greater its velocity will be impacted. Galileo demonstrated that g is the same for all objects regardless of their mass. This was confirmed by the apollo astronauts on the moon where there is no air resistance. Momentum the (mass x velocity) of an object. Force anything that can cause a change in an object"s momentum.
