Originally Posted By: kallog

80N * 50s = 4000N ??



Paul says: 80N * 50s = 4000N

As you have pointed out previously, this equality can't be an equality, because it has different units on each side. That is, it fails the test of dimensional analysis.

No amount of feet, nor any amount of pounds can equal 10 seconds. On the left we have some # of N times some # of s, but on the right we only have some number of N. This is the problem with Paul's system: the equal sign doesn't actually mean "equal" the way he's using it.

Once again, he disagrees with every technical person on the planet. We cut-n-paste "80N * 50s" into http://www.wolframalpha.com/ and the result comes up: 4000 N s (newton seconds)

Wolfram says you're right. Every other scientist, engineer, and mathematician on the planet says you're right.