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
The velocity of a particle of mass of 1 kg changes from 2 m/s north to 2 m/s east in 2 sec. The change in momentum of th...For a simple pendulum, a graph is plotted between its kinetic energy (KE) and potential energy (PE) against its displace...A force of 10N displaces an object by 10m. If work done is 50J then direction of force make an angle with direction of d...If the force applied is F and the velocity gained is v, then the power developed is:...The temperature at which thermal electric power of a thermo couple becomes zero is called :-...