And here is another example! This one is for older students who can do trig. The mass is known, and students can use a protractor to measure the angle. Predict the readings on the two spring scales.
And a few more. These are for my 9th graders, still on Day 1 of force problem-solving. Spending plenty of time on FBDs and vector addition diagrams in previous classes meant that they could figure out how to solve these problems themselves.
And finally, I did this one with my 11th/12th graders today. They measured the ramp angle & mass, and predicted the reading on the cart’s internal force sensor. This was their very first ramp problem, so of course none of them tilted their coordinate system and they had some Fun With Trig.
Jk they hated it, but their prediction was spot-on. Only after they solved it, I showed them how to tilt the coordinate system and they were immediately convinced that this is The Way.
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