IIT JEE , AIEEE Forum - Physics , Mechanics - forces--doubt

karthik2007

Here's a simple way to conserve energy:

Now, consider a body moving down a rough inclined plane. Its initial energy at the top was mgh, final energy at the bottom is 1/2mv^2.. but it will be less than mgh (coz of friction), right?
here, friction is the culprit, so while conserving energy, simply add work done by friction to the final KE to compensate.
mgh = 1/2mv^2 + f.S

do the same for other forces... make sure you find out where they are to be added

Ask & Discuss Questions with Community & Experts