Struggling with Physics Word Problems?

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In summary, the conversation discusses the speaker's struggle with applying physics concepts to word problems. The specific problem mentioned involves a spool of thread on a rough surface and determining the magnitude and direction of the frictional force. The speaker expresses frustration and seeks advice on how to improve their understanding and ability to handle unexpected problems. The suggested solution is to practice and solve similar problems using diagrams and algebraic equations.
  • #1
member 392791
I am in a dilemma right now where I find myself to be very bad at physics. I usually can figure out the concepts, however when it comes to applying these concepts to the word problems, if the problem becomes a little too hard (i.e. not a trivial plug in) I begin to struggle heavily. The worst part is, the tests are not trivial at all and the professor really gives us hard questions. As an example (I'm not looking to get this question answered!) on my test today

A spool of thread consists of a cylinder of radius R1 with end caps of radius R2 as in the end view shown in Figure P10.90. The mass of the spool, including the thread, is m and its moment of inertia about an axis through its center is I. The spool is placed on a rough horizontal surface so that it rolls without slipping when a force T acting to the right is applied to the free end of the thread. Show that the magnitude of the frictional force exerted by the surface on the spool is given by

f = (I + mR1R2/I + mR2^2)T

Determine the direction of the force of friction.

I just completely blanked, and I was like ''how is this testing my understanding of torque..this is a algebra game or something..''

It's just stuff like this that destroys me, what can I do? No matter how many problems I do if I get thrown a curveball I just don't know how to handle it
 
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  • #2
Draw a diagram for everything. That word problem is reduced to "plug in numbers" as you put it, given that you can understand what they are describing. The only way to get better at it is to practice. Do a TON of problems. You have already identified what specifically you are having trouble with. Open the book, find those problems, and do them.
 
  • #3
You titled this "good at math but bad a physics" so if it were "a algebra game or something" you should be able to do it! The difficulty appears to be precisely that it is "testing your understanding of torque". Draw a picture, as QuarkCharmer suggests, show where the various forces are and use the definition of "torque" to write down algebraic equations that can solve "algebraically".
 

FAQ: Struggling with Physics Word Problems?

Why am I good at math but struggle with physics?

There could be several reasons for this. One possibility is that you are more comfortable with the abstract concepts and principles of math, whereas physics involves real-world applications and experiments. Another reason could be that you lack a strong foundation in physics concepts, which can make it difficult to apply mathematical concepts to real-world scenarios.

Can I improve my physics skills if I am good at math?

Yes, it is definitely possible to improve your physics skills even if you are naturally good at math. You may need to spend more time practicing and understanding the physics concepts, but having a strong foundation in math can actually be beneficial in understanding and solving physics problems.

What are some tips for improving my physics skills if I am good at math?

Some tips for improving your physics skills include practicing regularly, seeking help from a tutor or teacher, and actively engaging in hands-on experiments and activities. It may also be helpful to break down complex physics problems into smaller, more manageable parts and to make connections between math and physics concepts.

Is it possible to be good at physics but bad at math?

Yes, it is possible to excel in physics while struggling with math. Physics involves a wide range of skills, including problem-solving, critical thinking, and practical application, which may come more naturally to some individuals. However, having a strong foundation in math can still be helpful in understanding and solving complex physics problems.

How can I overcome my difficulties in physics if I am good at math?

One approach to overcoming difficulties in physics is to practice regularly and seek help from a tutor or teacher if needed. It may also be helpful to find real-world applications of physics concepts to make them more relatable and easier to understand. Additionally, try to identify any specific areas of weakness and focus on improving your understanding and skills in those areas.

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