Recent content by kinsler33

Good question. I will admit that I didn't look at all the replies to this inquiry, principally because there were five or six pages of them. The solution to that administrative quandry is left as an exercise for the site owner. M Kinsler

But only the center of mass will precisely follow the trajectory of a thrown and spinning object. I think every physics text has a stock photograph of a thrown adjustable wrench.

Turn off the boat's engine and lift it out of the water. Now fling it into the air. It will then rotate around its center of mass.

Acceleration is a change in the speed and/or the direction of an object. Both a change in speed or a change in direction require an external force. Ask your friend if there's any way to change the speed or direction of an automobile without applying an external force--either the force of...

Didn't someone calculate a reasonable value for c by astronomical observation? Procedure (I think.) : Note the time T1 o'clock when a star peeks out from behind some heavenly body (a planet, maybe) on a night when that h.b. is at distance D1 from the earth. On another night, six months...

Didn't Dr Michelson settle this argument with the ether drift experiment? He did the first one in my home town of Cleveland, but you can buy the stuff to do it in your own physics class. I wonder if all this interest in the 'one-way' speed of light is perhaps an effort to rehabilitate the...

I never saw a good description of the actual application. For example, it sounds like it handles a considerable load, and must have some safety features and perhaps a remote control. But I don't recall reading how large it might be. If we're working on the order of 1 meter or more and, say...

This calls for some experimentation. To an old-time radio engineer your steel pipe would provide your inner coil with splendid magnetic shielding, and to a first iteration it would do just that. If, however, you were able to provide an alternating magnetic field of sufficient magnitude to...