3-25-09

Physics are seen in every day life. People just wondering how can two objects traveling at constant speed, when launches off each other, it will ends up at the same spot? Well today in Mr. Manning’ Physics class, we will be learning about the horizontal motion and vertical motion that are relate to the question asked above. As we learned from doing the lab and by watching the videos that showed in class yesterday, horizontal motion do not changes, but vertical motion changes over time periods. Why? Because the horizontal motion doesn’t have any acceleration or forces acting on the object. One question asked “If the horizontal doesn’t have any changes in its speed, then why does it still moving horizontally?” the object still moving horizontal at a constant speed because at first some forces already acting on the object, but due to inertia, the object still wants to travel at that direction. The vertical motion of the object has the acceleration of the gravity force pulling it to the ground. The speed is keep adding to the object every time period when it is flying up, and falling down to the ground. So as the question stated above, two objects will ends up at the same spot if they both are traveling at a constant speed because the horizontal motion should not changes it speed. On the next paper we could draw in to the first three circles the forces that acting on the ball. So we all now know that the only arrow that should be draw in is the pointing because of gravity.