Work, Power and EnergyHard
Question
A rod of mass m, uniform cross sectional area A and length L is accelerated by applying force F asshown in figure on a smooth surface. If Young′s modulus of elasticity of the material of rod is Y.(Consider x as measured from the right end)
Options
A.Tension in rod as a function of distance x is
B.Strain in rod is 
C.Elastic potential energy stored in the rod is 
D.There is no stress in rod.
Solution
at any distance x from edge let there be a cross section for which FBD is given:
for complete rod : ma = F ⇒ a =
...(1)for portion BC : mBC a = T ⇒ T =
a ; T = 
x ⇒ stress = ⇒ 
(C)
(D) Energy stored =
x2 dx A = 
Create a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
If the potential energy of two molecules is give by , U = then at equilibrium position, its potential energy is equal to...A particle is moving in a circle of radius r under the action of a force F = αr2 which is directed towards centre o...A wire when connected to 220 V mains supply has power dissipation P1. Now the wire is cut into two equal pieces which ar...On moving a charge of 20 coulombs by 2cm, 2 J of work is done, then the potential difference between the points is...A container of fixed volume has a mixutre of one mole of hydrogen and one mole of helium in equilibrium at temperature T...