Equailibrium & FBD

Consider one mole of perfect gas on a cylinder of units cross-section with a piston attched (figure). A spring (spring constant K ) is attched (unstrecthed lengthL ) to the piston and to the bottom of the cylinder . Inditially the spring is unstrecthed and the gas is in equailibrium. A certain amount of heat Q is supplied to the gas causing an increase of value from V_(0) to V_(1) . (a) What is the initial pressure of the system ? (b) What is the final pressure of the system? (c) Using the first law of thermodynamic, write down a relation between Q, p_(a),V,V_(0) and K.

A physiscs student performed an experiment by taking a beaker with 1 l of water oat 30^(@)C and dropping an iron sphere with temperature 90^(@)C in it . After sometime student tmeasure their equailibrium temperature as 48^(@)C .If the density of iron sphere is 7870 kg m^(-3) then find the volume of the iron sphere specifice heat of iron is 0.110 jcal g^(-1@)C^(-1)

Three large conducting plates with charges Q ,-Q and Q are kept close to each other as shown in the figure. (where Q=2 mu C ).Now all the three plates A ,B ,and C are connected by a thin conducting wire.Find the charge ( in mu ) on left surface of plate A at electrostatic equailibrium.

Three large conducting plates with charges Q , -Q and Q are kept close to each other as shown in the figure. ( where Q = 2 uc ). Now all the three plates A, B, and C are connected by a thin conducting wire. Find the charge ( in C) on left surface of plate A at electristatic equailibrium

Examples on FBD and Pseudo Force

A block mass 'm' is kept on the ground as shown in figure. Draw F.B.D. of block.

Three triangular blocks A,B and C of equal masses ‘m’ are arranged as shown in figure. Draw F.B.D. of blocks A,B and C. Indicate action– reaction pair between A,B and B,C.

PSEUDO FORCES AND ITS REQUIREMENT|FRAME OF REFERENCE|FBD

LAWS OF MOTION AND ITS APPLICATION| PULLEY| TWO BLOCKS EXAMPLE|BASIC OF FBD