A.2.7—Frictional force Topic Practice
A.2.7—Frictional force Topic Practice
Practise using static and dynamic friction in force and energy problems, including motion thresholds, slopes, and stopping distances.
How this is tested
- use F_f = mu_s N with full substitution to calculate the minimum force needed to start motion
- compare the applied force with the maximum static friction to explain why the object remains at rest
- use F_f = mu_d N in an equation or work done = force x distance to find acceleration or stopping distance