Recent content by gyshalom

im learning that the weight of a coloum of mercury in a barometer is balanced by the air pressure working on the reservoir at the base of the mercury tube..does the surface area over which the air pressure works matter? i understand that it is the height of the coloum,not the over all mass of...

thx everybody...a lot of food for thought

when i was in the army,i saw corp of engenires guys able to walk in a mine field on this foam mattress plates attached to their feet. now, i understand that this is possible because the foam spread their weight ( pressure?) along a bigger area,thus reducing pressure,how is the foam able to do...

thanks guys...it makes sense, but here is my problem:in all the physics problems i saw, dealing with rotational and translational motion, only the acceleration of one wheel being pulled by a force was discussed; are there any physics problem that deal with the acceleration of a load carried by...

Homework Statement suppose a block with mass m is being pulled by force f,the force of friction (first static then kinetic) will resist its motion. now, take this block and put it on a cart with wheels and pull it with the same force,when calculating the acceleration of this loaded cart,is it...