MadSci Network: Physics |
((Moderator's message:
This may be a homework problem, but I can't be sure. You may wish to give
a way to learn
about how to solve it rather than give a direct answer.))
Hello Shehadeh, Instead of just giving you a direct answer I'm going to
give you some pointers that should help you work out the answer for
yourself.
Now we need to know a little bit about Newton's 3rd Law of Motion (You may
know that Sir Isaac Newton was a very famous scientist who lived between
1643 and 1721, and he set out 3 laws which help to explain how and why
objects moved).
His third law explains what happens when two objects are pushing or
pulling each other - this is what your two magnets would be doing if they
were close to each other.
So if object (magnet) A pushes/pulls on object (magnet) B with a force of
X (usually measured in Newtons, but you can use "lbs", although it's not
very good Physics) then B will also push/pull on A with the same force X.
So for magnet A that would be 50 lbs.
But of course magnet B is also pushing at magnet A with its own repelling
force, so magnet A will also push back at magnet B with this extra force.
Now then, how do you think you calculate the total repelling force between
the two magnets?
For extra information about Newton's 3rd Law you can look at http://www
.physicsclassroom.com/Class/newtlaws/U2L4a.html
Hope this helps.
from Keith, your Mad Scientist in Wales, UK.
Try the links in the MadSci Library for more information on Physics.