Recent content by sid95

Yes the pulleys are massless, frictionless with the strings being inextinsible. My basic question is the one given in http://cnx.org/content/m14783/latest/ ( Search for Horizontal pulley system ) wherein vB=−đxB đt . I can't understand the -ve sign.

Can questions like the one given in the following pic be solved by taking the reference frame answhere in the middle of the string and not on the fixed pulley?(http://cnx.org/content/m14731/latest/pq8.gif) A somewhat similar method has been given in http://cnx.org/content/m14783/latest/"...