Recent content by EMguy

I would assume that the momentum remained constant cause of the assumption of gas pillar having no effect, i.e no recoil effects? Then velocity would be increased with the decreased mass? Correct? Incorrect? And by theoretical i mean real... just theoretical relating to the effects being miniscule.

Assume we shoot a space shuttle of mass m to space. We know it affects the Earth's mass M by decreasing it to M2 = M-m. Assume that the gas pillar that the space shuttle shoots has no effects on earth, what would be the theoretical effects on kinetic energy, momentum and velocity of the Earth by...

Sure, accelerating a heavier object requires more work as a WHOLE. But placing weight in the handle only increases the moment of inertia of the double pendulum relative to shoulder. As the weight is in the handle it does not increase the moment of inertia of the racquet relative to wrist...

Yeah, human body is more complicated than that. But the objective here would be to mimimize the stress on those tiny wrist muscles with the rod matching. When the racquet follows the arm without active force from the wrist, most of the work can be done with larger muscles. I'd like to experiment...

Yeah, that's what I meant. I thought it would be easier to analyze the problem in this way. With an applied periodic torque, one should know the effective rotational inertia at all time instants in order to find the acceleration from torque. This problem set is related to real life. In many...

I'd like to understand how the double rod pendulum works and how it changes when a point mass is added to one of the rods. Especially I'd like to understand whether it's possible to match the two rods with the point mass so that the movement is stable under sinusoidal applied angular...