Danger was a bit cruel, I doubt that you're a selfish son. Some motors do contain permanent magnets, but they all need some kind of energy input to work. You didn't say whether or not your dad's inventon needs electicity. If it does, then it probably does work. If it doesn't, then it's a...
In my diagram the pulling force P acts 1.2m above the bottom leading corner.
The weight acts through the middle of the base 0.6125m behind the leading bottom corner.
Taking moments about the bottom leading corner -
Force P accelerates the mass with acceleration A, and overcomes the friction...
In my diagram the pulling force P acts 1.2m above the bottom leading corner.
The weight acts through the middle of the base 0.6125m behind the leading bottom corner.
Taking moments about the bottom leading corner -
Force P accelerates the mass with acceleration A, and overcomes the friction...
Think of a toothed wheel rolling on a toothed rack. That's a rack and pinion set-up in engineering talk. Obviously the wheel won't slide, but if the teeth are small relative to the radius, the wheel will roll quite smoothly with only the gentlest push. Static friction is felt by the wheel as...
Using your small angle approximation, the ratio of the rates of change of the two angles is the same as the ratio of the two lengths, Man to m / Man to n. You have set this ratio to 2999999999:1 (y = 2999999999x + 1) so it doesn't define the speed of light. It just tells us that you already...