Reader questions and feedback on Physics. Also refer to physical science, chemistry, astronomy, electricity, magnetism, electromagnet, light, sound, waves, forces, work, energy, friction, heat, thermodynamics, Ron Kurtus, School for Champions. Copyright © Restrictions
Answers to Readers' Questions on Physics:
List of first 10 items
- I want know more about friction
- What will happen if friction is not there?
- Why take small steps on ice?
- What happens to friction energy?
- Sport where friction is important
- Coefficient of friction of mild steel on rubber
- How can friction be helpful?
- Wants to increase friction in Sitar
- Coefficient of static and dynamic friction
- How do we overcome friction?
February 23, 2011
I want know more about friction. Please send friction documents.
Aswani - India
Feel free to go through all our lessons on friction. Also look at the Reader Feedback in the Friction lessons.
August 13, 2010
What will happen if friction is not there? Explain briefly.
Aninda - India
Others have asked this question and are seen in Answers to Readers Questions.
You could not walk or pick up a pencil without friction, because everything would slip. You could not even turn over in bed, because friction is needed to do that.
Friction is needed to keep things from sliding or slipping.
November 16, 2005
While walking on ice, one should take small steps to avoid slipping. why is it so?
bns - India
When you take a large step, you are putting more force on the rear foot, increasing the slipping. Also, the angle that the shoe is on the ice is larger, which will reduce the normal force and thus reduce the friction.
November 15, 2005
What happens to the energy that is used to overcome friction, where does it go?
GT - USA
The energy turns from mechanical energy to heat energy. Just rub something vigorously and you will feel it get warmer.
October 26, 2005
select a sporting activity where the case that starting friction is greater than sliding friction can be advantageous to this case.
henry - Ghana
If you try to run, you want the friction to be great enough to move you forward without sliding. Any sport where there is running requires the static friction (starting) to be greater than the kinetic friction (sliding).
August 30, 2005
I'm desperately looking for the kinetic coefficient of friction value of mild steel on rubber (sponge rubber as used in automotive door seals)
Pls assist me or give me some broad guidelines.
Desai - South Africa
I'm sorry, but we haven't been able to find that information. You might try to determine the value experimentally.
February 27, 2005
how can friction be helpful and how can it make things difficult? Please give me two reasons. I need it as soon as possible for my science test on tuesday. Thanks. And also, can you tell me how friction was involved. Because on my experiment, I used a block of wood and rubber band and let the spring scale move on the sandpaper. I don't know why it takes more force on the sandpaper than the other surfaces like waxpaper. Thanks.
Queenie - Canada
You couldn't walk without friction, because you'd slip like on ice. But friction make it hard to slide things.
Rough surfaces have a higher coefficient of friction and smooth surfaces.
January 16, 2005
I have a musical instrument (Sitar) whose wooden pegs become smooth due to constant use and do not stay when turned but slide back. What subtance can I use to increase friction?
Subramony - Malaysia
If you sanded the pegs, they would have more friction again. But unfortunately, they might also be slightly too small to stay in place.
Wrapping each with a piece of masking tape might work. But, you may end up having to replace the pegs. I would think this is a common problem with the Sitar, so I wonder if local music stores would have a better solution?
Best wishes on getting it to work properly.
November 22, 2004
.what is the diffrence between the coefficient of static and dynamic friction.
describe the term, limiting coefficient of static or dynamic friction.
hassan - UK
The coefficient of friction is the number that affects the resistive force of friction. Dynamic friction is the same as kinetic friction. It is the resistive force on a moving, sliding object.
May 17, 2004
By what methods do we overcome friction?
Thanks for your kindest help.
sibel - Canada
Friction is a resistance to a force pushing an object. The force overcomes that resistance. You can reduce the friction by means of a lubrication, like grease or oil.
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