S39: This looks like a homework problem I just had and did not understand. For example, does the ball fall at the same speed constantly (till it hits the ground) For example, if t = 2, does distance = 16(22) = 84?

S11: Asks for average speed but if a ball was dropped it would not fall at a constant speed. Gravity pulls on an object at 10m/sec2. So this problem was a bitch.

S40: I have not learned how to do change in acceleration yet.

S23: Here’s one of those time, distance problems; sorry but I really, really hate these types of problems.