Journal Entry 12/14

It means that the bus is consistently gaining speed. Specifically it gains 1 more meter per second than the previous second. So at 1 second it will move 1 m and at 2 seconds it will be at 3 m and at 3 seconds it will be at 6 m and so on.

At 5 seconds it will be at 15 m. I continue the pattern and end up with 15 m.

journal entry 12/7

Constant velocity means that you are moving at a consistent speed and covering the same amount of ground per second. Constant acceleration means that you are accelerating at the same rate per second, but coving a different amount of ground each second.

No an object cannot have both because in order for something to be accelerating, it needs to have a consistently increasing speed.

Depending on the speed of the cars, the one with constant acceleration, if moving fast enough would win the race. But if the car with constant velocity is fast enough then it can win the race.

Journal Entry 11/30

For an object to be moving in one direction means that it can only move in 2 ways. It can only move one way or another. It cannot go any other way in 1 dimension.

Yes the real life motion changes because it's being compared to a different thing. It is being described or seen in relation to the different axis.

If an object has a negative velocity it only means that its moving backwards, therefore having negative speed. With positive velocity it will be moving forwards.