Journal Entry 11/16

An observer who would see the ball moving at 100kmh would have to be on the truck. They would have to be facing the same way as the ball was facing. Their object of reference would be the truck.

An observer who would see the ball as not moving would have to be on the ground. When the ball is shot at 100kmh from the truck thats traveling at 100kph then it will fall straight to the ground as seen in the video. Their object of reference would be the ground.

An observer who would see the ball as moving more than 100kmh would have to be moving faster than the truck itself. So that when it is dropped the observer would be moving away from it at more than 100kmh which would make it appear to be moving at more than 100kmh. Their object of reference would be their car because of the fact that they aren't on the same truck.

The observer on the ground is right because the ball really does not move. The motion of the truck going 100kmh cancels out the ball shooting out at 100kmh. As seen in the movie, the ball just falls straight down. They cancel each other out. The ball moving backward after it touches the ground is because the ball was spinning. The ball just falls straight down.