As an alternative to the car lab I have a set of INERTIAL BALANCES that work slick too.
F=ma: Slide 1, then stack of 2, then stack of 3 identical books across lab table measuring Newtons of force needed to pull the books. Keep acceleration the same my pulling at the same speed. Not real exciting...but accurate.
Hope this helps,
Love to Teach and Teach with Passion
Remember...It's not Magic, It's Science
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