Recent content by Prathamesh

Nope...i ve found the torque acting on the rod when it is in hzt position only... and hence angular acceleration (alpha) also changes with theta...so by putting theta =π/2 i ve found w

Homework Statement A uniform rod of length L & mass m is suspended through an end. It is shifted through an angle of π/2 radian i.e. made horizontal and then released. Find angular velocity when rod is vertical.[/B]Homework EquationsThe Attempt at a Solution My attempt to a problem is attached...

For any rod Poisson's ratio should be same i.e. 0.5 (we get this ans if we find (dr/r) / (dl/l) ) assuming that volume of rod always remains constant... But why it is not so ? We have different ratios for different materials..

Is it Nsinθ??

Homework Statement All the surfaces shown in fig. are assumed to be frictionless. The block of mass m slides on the prism of mass M which in turn slides backwards on horizontal surface with acceleration of ao. Find the acceleration of smaller block with respect to prism. Homework...

Ohhh yes.. I got it! Thank you all very much!

I've one more problem. But if it is solved , by 1st method (F=kx) then ans comes wrong... Hence, Tension in string = mgsin37-μmgcos37 which extends/pulls spring of k = 100N/m by 0.1m F=kx=100*0.1=10N ∴mgsin37-μmgcos37=10 But in this way μ comes negative. And solution says Potential ene. of...

I don't understand the concept of spring work... Is this concept introduced due to variable force with respect to x?

Spring is massless and vertical

Homework Statement A block of mass 1 kg is attached to a spring. The spring extends by 10 cm. Find spring constant.Homework EquationsThe Attempt at a Solution Potential energy of spring = kx2/2 work done by block = PE Hence mg*x=kx2/2 ∴1*9.8*0.1=k*0.1*0.1/2 ∴k=196N/m But solution says mg = kx...

so, ΔHp should also be equal to ΔHv since it is a state function like internal energy U , why it is not so?

Calculate the difference between heat of reaction at constant pressure and at constant volume for following reaction at 298 K. N2(g)+3H2(g)→2NH3(g) My attempt ~ At constant pressure ΔHp=ΔUp+PΔV At constant volume ΔHv=ΔUv ∴ΔHp-ΔHv =ΔUp-ΔUv+ PΔV And PΔV = ΔnRT But what to do of ΔUp-ΔUv? In...

Thank you very much haruspex and ray vickson... I just wanted to make sure that i m going in r8 direction

Homework Statement An elevator is ascending with a uniform velocity 2 m/s when a loose bolt gets detached from the ceiling and falls on the floor. If the ceiling is 3 m above the floor , find the time required by the bolt to fall from the ceiling to the floor? (g=10 m/s2) Homework EquationsThe...

since cosθ comes -0.94≈-1 , it is approximately same as subtracting E1 from E' ... Thank you...