Recent content by vladim1

Hello, is this question so difficult?? At least, pleas, can someone explain me how spirit level works.

Hi people. Please explain me, why in a horisontal pipe (closed) a bubble go to middle, and not stay in any other position? Also what is the difference of forces when this bubble moves from right/left to middle and when it rise from bottom to top. I know bubble rise due to buoyancy...

I found a formula to calculate force needed to aply on axle (pushed wheel) to overcome obstacle: F=m*g*sqrt(2rh-h^2)/(r-h) where: m= load r= radius of wheel h= obstacle height Which formula must I use to calculate torque needed to overcome same obstacle, rotation start from rest...

Thinking we discuss about thing I don't need. Me interest is to calculate rolling resistance (in N) for a surface which have obstacles of 1cm height (eg. after each 5cm). Also I observe that a heighter wheel go easier after road's deformations.

Ok, how you say then I must calculate energy whith formula E=mgh, to determine what power I need to pass an obstacle with "h" height. But, how is explained that a wheel with bigger radius pass a same obstacle easier than one with smaller? How much role play differences in dimentions, is there...

Hi to all Please help me to clarify this situation: There is a rotated wheel on a plan surface. What torque/power will be necessary to spring an obstacle with a concrete height. For ex. here are some data: 1.Wheel mass 10 kg 2.Wheel radius 0,3 m 3.Rotation speed 100 RPM 4.Obstacle...