Recent content by Bartek

OK. now I read what I wrote... horrible :cry:! You are right, it isn't possible not to dispose energy. I do not delete my posts only for next generations shame exemplar. The only excuse that can be scorching heat in July.

But... acrobat loves monkey, isn't he? In collisions mechanical energy is not conserve, because of deformation energy, heat energy etc. When acrobate grabbing monkey he minimalize all that cases, and grab animal carefully. Dispersal of energy can be omit, I suppose :smile: Whatever, as...

You are right. I imagine, that "monkey grabbing" is not the same as "inelastic collision with monkey", so energy will be conserved. If we have to use collision point of view, it's necessary to use momentum conservation of course. deltaP is equal to F*t. We know initial and final momentum...

Use energy conservation up to end. At start point energy is equal to acrobat's kinetic energy plus monkey's potential energy. At the end it is equal to both's potential energy at max. height

Well... you asked about inspiration, not solution :smile:. Weber-Fechner law is well known law. You can just ask: "is this law correct?". Or you can investigate question: "What is the smallest noticeable stimulus difference? Is it independence or depend from stimulus level?"... and develop...

Both :smile: see https://www.physicsforums.com/member.php?u=257027" on PF regards & sweet dreams Bartek

Yes. muscles :biggrin:. Both teams are pushing the ground... so, ground pushing the teams. Stronger win.

Imagine both teams and a rope as a one rigid body. What forces exert this "body" horizontally? When it will be moved?

No! When line was tested a=g. So Fmax is (22.72)*9.81, not 11.81 (during test the mass of 50 pounds hanging motionless). F_max is a maximum line tension. When fisherman yanks a fish, this Fmax should be equal to (m_fish)*(2+9.81). You can calculate m_fish. regards ps. 50 pounds is equal to...

When a fisherman yanks a fish straight up out of the water, the acceleration of 2m/s^2 should be added to gravity acceleration (9.81m/s^2). regards

If you are looking for something fun, I suggest to investigate the Weber-Fechner law. It is mainly founded on experiments where persons were given two nearly identical stimuli (for example, two similar weights) and tested whether they could notice a difference between them. It was found that...

Absolutely right! As the problem is stated I can't find there any word about type of equilibrium. I believe, that this: [PLAIN]http://img267.imageshack.us/img267/1874/foot2v.jpg can be in unstable equilibrium as well as pendulum.

Which one? Men on tiptoe is in unstable equilibrium too.

Why unresolvable theoretically? Body is in equilibrium when center of mass is preciselly above point of footing. THEORETICALLY. IF basement is one point, body is in unstable equilibrium. Accepted in physics. THEORETICALLY. regards

Well... my proposition to solve I show in https://www.physicsforums.com/showpost.php?p=2793199&postcount=3". There were no word about friction :smile:. I think there are many problems with no chance to happen. Do you remember https://www.physicsforums.com/showthread.php?t=412600" which flying...