Recent content by REVIANNA

I can't convince myself that the situation in this picture is possible in reality though I know the physics works. I feel that it won't work as the workers are not glued to the platform can anyone find a demonstration to verify it .please (I'v searched youtube as much as I could) people lifting...

Mod note: Moved from Homework section I know that ##1/n^4## converges because of comparison test with ##1/n^2## (larger series) converges . how do I know ##1/n^2## converges? coz I cannot compare it with ##1/n## harmonic series as it diverges. @REVIANNA, if you post in the Homework & Coursework...

oh I thought that the difference is only about two hrs. I know that.I thought that like some others they have taken rightward and clockwise as positive but you're right we can't assume it unless its mentioned . I understand that for the square sheet α increases and for the blue rod α...

@haruspex for the first two problems ω is increasing because of the direction of rotation- clockwise . are the trends in α (which I understand now ) related to the trends in ω?

I think this is the case with this problem it asks for The vertical component of the acceleration of the free end of the bar ##v^2/R=(6gL)/L=6g## and similarly I found the The vertical component of the acceleration of the midpoint of the bar (3g) the horizontal components of acceleration are...

A uniform bar of mass m and length L is pivoted at one end and is held vertically as shown. After the bar is released, it swings downward with no friction in the pivot. At the instant the bar is at the bottom of the swing, find the magnitudes of the following quantities: 1-ω instead of L/2 I...

why? and what about ω ? I don't seem to understand ω and α properly. when I was learning just linear acceleration it used to be mostly const. how should I think about it -in terms of forces,energy or intuition or their linear brothers v and a.

so stupid of me obviously up the incline! I am confusing net F (linear acceleration) with net torque(angular) thanks a lot

the disc is rolling down the incline therefore static friction should also point down the incline (because it is the one causing the rotation) but the answer turns out to be correct if I consider the static friction up the incline (like T) angular acceleration is pointing out of the...

the one on the incline will static friction point down the incline?

Homework Statement [/B] A thin light string is wrapped around a solid uniform disk of mass M and radius r, mounted as shown. The loose end of the string is attached to the axle of a solid uniform disc of mass m and the same radius r which can roll without slipping down an inclined plane that...

The square is pivoted at vertex D and initially held at rest so that sides AB and CD are horizontal. After it is released, the plate swings downward, rotating about the pivot point...

Homework Statement This is a general query not a specific problem. In several questions in rotational dynamics they ask the trend in angular acceleration and angular velocity.In one of them they released a rod from horizontal position and asked if the angular velocity and angular acceleration...

first I considered the situation b/w the launch and the collision here the mechanical energy is conserved. It gets converted from purely potential to partly kinetic and partly potential(because it moves past the equilibrium point ) I used this to find the velocity of m right before the...

so m will go beyond x , collide with m2 at x/2 , stick with it, and then they both move forward . we have to calculate how far before spring pulls them back I wrote an equation with equilibrium as 0 position and equating the initial potential energy of m (##0.5kx^2##)and the final...