I have some questions that I need help answering and are due friday september 30th but i need the help to answer them. ok here goes. The question is What is the difference between motion at constant velocity and motion at constant acceleration? Explain your answer. I say that there is no difference because motion at constant velocity and constant acceleration is zero. Is that right or is there someway you can help me understand. The other question is if you have a baseball and a lead ball, that is much heavier, that is falling from the same height as the baseball, and the drag is negligible how would the strobe of the lead be different from the baseball strobe? My answer to this was they would be the same. Our teacher said something about the weight has nothing to do with it. I am confused because I missed that day of lecture due to a sick kid. can you help me understand? Another question was if a package is placed in a bed of a pickup truck and it slides towards the back when speeding up and towards the front when slowing down. Which newtons law? apply it directly to the motion and explain why. I think it is newtons first law but the laws confuse me. I need help explaining the laws to answer this question.