Lesson 2- Changes in Motion
Adrianna's 4 concepts
Weightlessness is when you are thinking you have no weight. Many times you are floating around when you are in weightlessness. Even though you think you have no weight you keep your same weight. Some examples are when you are in outer space you will be floating around unless you have gravity acting upon you. Also if you are skydiving you feel as if you have no weight.
Momentum is when the speed and mass of an object are added together. This is useful for studing the motion of objects colliding. A soccer ball has more momentum than a ping-pong ball traveling at the same speed. This is because the soccer ball has more mass within it. Another example is a bowling ball rolling on the floor would have more momentum than a golf ball.