Activity

To @mrmhead.

<hr />

I am absolutely sure solely and only about the validity of the experiments, described in PART 3 of our first video. And these are as follows. (Let me only remind them again.)

<hr />

1) Please look again at PART 3 of the link https://www.youtube.com/watch?v=xX14NK8GrDY&t=24s and at our post of  June 26, 2021 at 3:08 am. Please focus on the “upper” zigzag case.
2) Ma = 1 kg.
3) Mb = 4 kg.

4) mass of each couple blue rod-blue ball = m = 0.0001 kg (and even smaller)

5) V1 = Va’ = pre-zig-zag velocity of the blue component = 1 m/s = const.
6) Vb’ =  pre-zig-zag velocity of the black component = 0 m/s; the black component is motionless.

7) Va”’ = V2 = post-zig-zag velocity of the blue component = 0.6 m/s = const. = theoretical value

7A) Va”’ = V2 = post-zig-zag velocity of the blue component = 0.5999992 m/s = const. = mean experimental value

8) Vb”’ = V3 = post-zig-zag velocity of the black component = 0.1 m/s = const. = theoretical value

8A) Vb”’ = V3 = post-zig-zag velocity of the black component = 0.0999997 m/s = const. = mean experimental value

9) Number of zigzags = 4

10) Force of friction inside the zigzag channels = 0.0000001 N = mean experimental value