udiboy1209
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 Oct 22 comment What is the proof that a force applied on a rigid body will cause it to rotate around its center of mass? @AsadSaeeduddin I guess my answer is incomplete. If we agree that the COM is in linear motion and the body is rigid, each point on the body will have to be at constant distance from the COM at all times. This is only possible if each point is in linear motion too with the same velocity as the COM(i.e. stationery w.r.t. COM) or in circular motion about the COM (w.r.t COM). The COM being in linear motion has nothing to do with it being the center of rotation. It is the other way around. Aug 16 comment Force applied to an inclined plane yes you are right Jun 24 comment Where is the “event horizon” on a basketball hoop? @fibonatic, nice one there! You could do the same with a basketball in a single bounce off the rim, but as I said, it will require a high enough rotational speed Jun 3 comment Travel time for accelerating object @Joshua , the area of trapezoid wont be a simple function but a combination of different functions in different ranges. In the end you will end up following the same procedure described above, which is a perfectly acceptable way to solve such problems Apr 29 comment Optimal slit width in Young's double slit experiment How far apart were the pinholes/slits ? and what equipment did you use to make them, what kind of film etc.? Also could you post pictures, although that's not really necessary Apr 7 comment Why can two (or more) electric field lines never cross? If I had a penny for every time this question was asked on this site (not directly, so I don't think this could be a duplicate) Mar 25 comment Simultaneous Charging and Discharging Capacitor You have got the concept of a capacitor horribly wrong. A capacitor in the very basic sense is two conducting plates placed parallel to and not touching each other. When you apply a potential difference across these plates, charge accumulates on them and the capacitor gets charged. Mar 24 comment How do I see things of the bright room, being in the dark room? Great 10 second video by minutephysics, related to you question: youtube.com/watch?v=VvqbjUtt3mM Mar 24 comment Free fall from space ZilbermanRafael What is happening here is that the acceleration $a$ is changing with $r$ when you go to a large height of 500km. Near the surface, this acceleration is equal to $g=-10m/s^2$ and it is approximately constant for small heights. To solve your problem what you have to do is use $GM/r^2$ as you acceleration, and then proceed with solving the differential equation in $r$ and $t$. As @garyp suggests, this requires a certain level of knowledge in calculus. Mar 24 comment How does a Photocell/Photoresistor work? Did you read Wikipedia? It explains the basic functioning of an LDR quite well. If you want a more detailed explanation probably about the function of CdS , specify it in the question. Mar 23 comment Equation of motion for a falling rod (with one end touching a frictionless surface) @Austin Gravity isn't the only force on the rod, there is a normal force on the rod too from the ground. Mar 23 comment Where is the “event horizon” on a basketball hoop? I haven't checked the math, and there is a chance this is not possible. I leave that for you to determine. Mar 23 comment Can effect of gravity be broken (counteracted) by electric force? Kinda like Millikan's Oil Drop Experiment ? Mar 23 comment Choosing proper centripedal force in Newtonian gravitational forces What you need is a proper scale-down factor to try and fit large orbits of satellites around the earth onto your screen so everything is visible properly. What you need to scale-down here is not earth's mass, but the radii of the orbits. So let the mass of the earth be the same, and also the definition of other units, and try to simulate the exact distances which would exist. Then scale-down to make the simulation fit your screen (eg. 500 mtrs -> 50 pixels) Jan 21 comment How can one calculate the distance a particular sound will travel? There won't be a definitive point where the wave will "stop". The wave's intensity would exponentially die down with distance, and it greatly depends on the conditions of the medium it is travelling through. Jan 13 comment From where we can view earth moving? You can see the earth moving if you are not moving with it. Nov 22 comment Atwood machine problem The impulse might have deformed the pulley a bit(compressed it), like an inelastic collision. That deformation will produce heat, which leads to loss of mechanical energy. Nov 15 comment Constant Velocity 'Force'? Why do you feel it is "actually not a force"? Is it because you feel the force doesn't cause any acceleration to the body it hits? That is not because there is no force, but because all the forces acting on that body cancel out. Nov 14 comment Initialize a traveling wave in a 1D gas? can show a diagram of how it breaks into two rarefaction waves? Nov 10 comment Period of small oscillations Given small vertical oscillations, you can assume the motion to be simple harmonic. Then the time period would be given by $2\pi/\omega$.