Answer:
Step-by-step explanation:
Finding final velocity.
[tex]\boxed{v_{f}=v_{i} + at}\\\\v_{f} -- > final \ velocity\\\\v_{i} -- > Initial velocity[/tex]
a -> accelaration
t ---> time
[tex]v_{i} = 7 \ m/s[/tex]
a = 2 m/s²
t = 5 s
[tex]v_{f}= 7 + 2*5[/tex]
= 7 + 10
= 17 m/s
10) h = 5 m
g = -10m/s²
[tex]t =\sqrt{\dfrac{2*h}{g}}\\\\ =\sqrt{\dfrac{2*5}{10}}\\\\= \sqrt{\dfrac{10}{10}}\\\\= 1[/tex]
t = 1 sec
