Ayudaaaaaa por favor?

1. - b) porque la desaceleración es aceleración pero negativa

2.

- a)<img src="https://tex.z-dn.net/?f=m%2F%20s%5E%7B2%7D%20" />

3.

- vf = <img src="https://tex.z-dn.net/?f=5m%2Fs%2B%201m%2F%20s%5E%7B2%7D%2810s%29" />

vf = <img src="https://tex.z-dn.net/?f=5m%2Fs%2B10m%2Fs" />

vf = 15m / s

R = c)

4.

- <img src="https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B72km%2Fh-36km%2Fh%7D%7B30s%7D%20" />

<img src="https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B36km%2Fh%7D%7B30s%7D%20" />

<img src="https://tex.z-dn.net/?f=36%20%5Cfrac%7B1000m%7D%7B3600s%7D%20%3D%2010m%2Fs" />∴

<img src="https://tex.z-dn.net/?f=a%3D%20%20%5Cfrac%7B10m%2Fs%7D%7B30s%7D%20" />

<img src="https://tex.z-dn.net/?f=a%3D%200.333m%2F%20s%5E%7B2%7D%20" />

R = a)

5.

- <img src="https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B0-36km%2Fh%7D%7B10s%7D%20" />

<img src="https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B-36km%2Fh%7D%7B10s%7D%20" />

[img = 10]

[img = 11]

[img = 12]

R = d)

6.

- [img = 13]

[img = 14]

[img = 15]

108km / h = 30m / s

[img = 16]

[img = 17]

[img = 18]

7.

- [img = 19]

[img = 20]

[img = 21]

[img = 22]

R = b)

8.

- [img = 23]

[img = 24]

[img = 25]

R = c).