Here is a quick worksheet on a box on an inclined plane. It's pretty basic, but I have included a second worksheet with some more difficult questions for those that would like it.
1. Students first draw force normal, force perpendicular and force parallel
with their numerical values.
2. Students calculate the force normal.
3.. Students find the acceleration on a frictionless plane
4. I then introduce friction at .30 and ask for the force of friction
5. I then ask for the new acceleration.
This is an early page of a workbook on Physical Science coming out in June by Scorton Creek Publishing.