# Mechanics - Forces on Slopes

> Source: https://ollybritton.com/notes/a-level/maths/topics/mechanics/forces-on-slopes/ · Updated: 2021-11-20 · Tags: school, mechanics, year-2

## Flashcards
### 2021-11-20
##### ![PHOTO FORCE ON SLOPE ANGLE](force-on-slope-angle.png) What is the angle beneath the red block??
$$
3\text{kg}
$$

##### ![PHOTO FORCE ON SLOPE RESULTANT SIMPLE](force-on-slope-resultant-simple.png) What is the resultant force in this diagram, assuming no resistive forces??
$$
3g\sin(30^\circ)
$$

##### ![PHOTO FORCE ON SLOPE RESULTANT RESISTIVE](force-on-slope-resultant-resistive.png) What is the resultant force in this diagram??
$$
2g\sin(20^\circ) - 2
$$

##### ![PHOTO FORCE ON SLOPE RESULTANT ANGELED RESISTIVE](force-on-slope-resultant-angeled-resistive.png) What is the resultant force in this diagram??
$$
5g\cos(60^\circ) - mg\sin(30^\circ)
$$

### 2022-01-20
##### What will happen to the direction of friction for an object moving up a slope but accelerating downwards??
It will flip direction when the object flips direction.

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