Help \: pls \: tnx \: i \: will \: give \: 10pts ​

Question

`help \: pls \: tnx \: i \: will \: give \: 10pts`
​

Answer 1

8) D a book resting on a desk (because its not moving or do anything so the forces are balanced)

9) (sorry not to sure on that, it might be inertia)

10) b (because velocity is a vector, which has direction and magnitude)