Kinematics without definite values

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In summary, the speaker is struggling with three physics problems due the next day and is unable to visit the tutoring center due to a snowstorm. The speaker normally has no problem with given data, but is struggling with problems that do not have definite numbers. They are seeking guidance on how to proceed and typically uses four equations to solve problems. They have attached links to the problems and are wondering how to determine the greatest velocity in a problem. The expert suggests using the same formulas and manipulating them to get a simplified result before plugging in numbers to avoid errors. They also ask the speaker to attempt the first problem before seeking further help.
  • #1
JJ91284
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I've got a homework packet that I've been working on that's due tomorrow afternoon. I was planning on visiting the physics tutoring center today on campus, but everything is shut down because of the 21" of snow that we got last night.

I have 3 problems that I've been staring at for the last hour or more and I just don't know how to proceed. Normally I have no issues what so ever when data is given. These problems don't have definite numbers so I'm struggling on how to even proceed.

Any guidance on how to get going would be appreciated

Normally I use these 4 equations and I just manipulate the equations and they work great.

X=X0+V0t+.5at2
V=V0+at
V2=V02+2aΔX
S=d/t

I'm attaching 3 links so you can see my physics problems. One last question I'd like to ask just to make sure I answered another problem correctly in my packet. When a problem asks when is its velocity greatest. Do you always go with the the highest positive number, or do you factor in a negative value as well. I know speed doesn't matter which direction your going. Velocity sign (+ or -) on the other hand indicates which direction. So if you have steeper declining slope vs a lower inclining slope on a position vs time graph, would the steeper declining slope have a greater velocity?

P1
http://img20.imageshack.us/img20/7853/001vtt.jpg

P2
http://img543.imageshack.us/img543/9262/2001v.jpg

P3
http://img80.imageshack.us/img80/1522/3001hs.jpg
 
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  • #2
You proceed by using the same formulas. The answers will simply be in terms of the given information (h, d, t, etc.).

Presumably the idea is to get you thinking in terms of manipulating the mathematical formulae to a final, simplified result formula before numbers are plugged in. Eventually you will appreciate that this avoids a lot of rounding and truncation errors creeping into lengthy strings of manipulations.

Why don't you take the first problem (the falling flower pot) and give us your thoughts on how to proceed. Make an attempt and we can help.
 

What is kinematics without definite values?

Kinematics without definite values is a branch of physics that studies the motion of objects without considering numerical values such as distance, speed, or time. It focuses on the relationship between position, velocity, and acceleration without assigning specific numerical values to them.

Why do we use kinematics without definite values?

Kinematics without definite values allows us to analyze the general characteristics of motion without getting bogged down by specific numerical values. It provides a framework for understanding the principles of motion and can be applied to a wide range of situations and scenarios.

What are the main equations used in kinematics without definite values?

The main equations used in kinematics without definite values are the equations of motion, which include the equations for position, velocity, and acceleration. These equations describe the relationship between these three variables and can be used to analyze the motion of objects without definite numerical values.

What is the difference between kinematics with definite values and without definite values?

Kinematics with definite values involves analyzing the motion of objects by assigning specific numerical values to measurements such as distance, speed, and time. On the other hand, kinematics without definite values focuses on the general principles of motion without considering numerical values, allowing for a more conceptual understanding of motion.

How is kinematics without definite values applied in real life?

Kinematics without definite values is applied in real life in many different fields, including physics, engineering, and animation. It is used to analyze and design various systems and structures, such as roller coasters, airplanes, and robots. It is also used in animation to create realistic and accurate movements for characters and objects.

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