The position graph for the ball's motion starts at the axis implying that the velocity is zero.PHYS 101 :: Physics Illinois :: University of Illinois at Urbana-Champaign Home page Announcement The graph is going at a angle upwards showing that it is increasing at a constant speed. The yt graph also starts with a velocity of zero. The graph is curved showing the velocity increasing as it goes back to zero moving downward. The vx velocity graph is not changing or moving which is showing us constant velocity. The vy horizontal graph is going at a constant velocity downwards. The equation delta y=1/2 at^2+voyt is used because the motion of the ball is free mall motion, and free fall motion is shown best with this equation because -9.8m/s^2 is used for the gravitational fall.The balls velocity starts at the axis with a velocity of om/s. -9.2m is the total displacement of the ball passing through the photo gates.9.2m is representing the delta y in the equation. Since the graph is going downward the -9.8m/s^2 is used to refer to the acceleration for the earths gravity. T=1.37S, meaning it took the balls 1.37s to fall off of the table.To find the total distance that the ball traveled from starting on the table to falling ff, i took 1.5m/s which is the velocity of the horizontal graph and multiplied it by 1.37s, the amount of time it took until falling off and got 206m beig hte complete distance the ball thraveled from stat to finish.This semester I started tutoring in the physics and math study center. I am the only “pure” physics tutor – the rest of the tutors are mathematicians or engineers who feel very comfortable with mathematics (justly so, they’re all quite awesome). Most of them shy away from physics problems, though, letting me – and a handful of other tutors – deal with the dreaded subject. In general, physics seems to have this aura to it that scares people before they even start solving a problem. This begins with very basic physics, but continues with higher level material. The difference seems to be that only those who like physics – and find a good way of dealing with it – stick around to deal with the higher level stuff. Physics – and most science subjects – can be very complicated. Describing our world is not always intuitive, and sometimes requires a mathematical and conceptual understanding that is very advanced. That much can explain why not everyone goes for a physics career. In basic physics – material covered in high school and low level university courses – the methodology is straightforward. Quite often, it’s the panic itself that prevents students from dealing with the subject carefully and getting the most out of those courses. In my experience tutoring for (and taking) low level physics classes, I have worked out a few ground rules that can help you conquer problems. These will help whether the problem is in a homework assignment or on an exam. Sounds obvious, right? And yet, it’s harder than it sounds. You look at the question and the sentences loom at you menacingly, confusing you to no end. You have no idea where to start, even if you recognize the basic concepts. Whose cars go in which direction? What type of wave travels on the string? Help me, you think in terror. This is your time to take a deep breath, close your eyes, and count to five. In lower level physics, most questions can be solved by simple formulas. As long as you remember these formulas, you are most of the way to an answer. From now on, the only thing that you need to concentrate on is converting the horrible, confusing chunk of text into readable bits that fit into your formulas. What is going on in this problem? Is this a ball free-falling from some height? Is it Superman’s velocity as he flies to save Lois Lane a certain distance away? Or perhaps it’s a question about magnetism? Electricity?įigure out the context first. You don’t have to understand all the small details, but once you know what you’re dealing with in general, you will know how to formulate your answer and which equations to use. So you understand the physical situation now, and you know what subject this question deals with (or multiple subjects). Now, read the question again, and make sure you are clear on what it actually requires you to find. The same type of problem – say, bouncing ball – can ask you to find initial velocity, maximum height or angle of launch.
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