I am famous for not giving a crap about units.

]]>Please always use units! I can multiply feet per second by seconds to get feet. I can even convert furlongs per fortnight into a fraction of the speed of light, because I can multiply by fractions that equal one. I cannot take a dimensionless number and flat-out assume that the answer is in feet per second.

The first two weeks of my high school chemistry class were spent on a review of basic algebra, labelling of terms in word problems, and dimensional analysis. Mr. Wingo’s students did very well, in part because they had a solid understanding of what their numbers and formulas meant.

Question 5 would be much better stated as:

A projectile is launched into the air. Its height as a function of time can be modeled by the equation h(t) = -16 ft²/sec² t² + 22 ft/sec t + 3 ft

Select ALL of the true statements at right.

h(t) = -16 ft²/sec² t² + v₀ t + s₀, where v₀ is initial velocity and s₀ is initial height

Of course, I expect that you will continue to use proper superscripts instead of ² and proper subscripts for v₀ and s₀.

]]>Testing special cases of subscripts and superscripts: g₀ = 9.80665 m/s² * (1 ft) / (0.3048 m) = 32.174 ft/s²

]]>Sure. If you email me, I’ll send what I have. Be sure to tell me if you see glitches, I’m notorious for them! this blog name at gmail.

]]>You did! But they also like the tests, so there’s that.

]]>*“The top kids in particular complain about the difficulty!”*

Ha! I called it. 🙂

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