Forces

1

CER Writing: Scientific Arguments About Forces

ACT: points and requires more force to slide past each other. Smoother surfaces like ice have fewer irregularities, so there are fewer contact points, resulting in less friction. This explains why ice has the lowest friction (0.5 N) while sandpaper has the highest (8.5 N).

2

Data and Graphs: Representing Force Relationships

3

Gravity

4

Investigation Lab: Forces in Action

ACT: of random errors. By calculating an average from multiple trials, you get a more accurate representation of the true value.

5

Newton's Laws

6

Unit Checkpoint: Forces