Answer:
please mark brainlist 
Explanation:
Initial speed   u=80 km/h=80×185=22.22 m/s
Final speed    v=60 km/h=60×185=16.67 m/s
Using   v=u+at
Or   16.67=22.22+α×5
⟹ a=−1.1 m/s2
 
        
             
        
        
        
A) the final velocity = 66/9 m/s.
b) The total momentum before and after collision is the same because energy is destroyed or made.
Thanks brainly. <span />
        
             
        
        
        
Answer:
<h3>30m/s</h3>
Explanation:
acceleration is the change in velocity of a body with respect to time
a = v-u/t
v is the final velocity
u is the initial velocity = 10m/s
t is the time taken = 10s
a is the acceleration = 2m/s²
substitute the values into the formula
2 = v-10/10
cross multiply
20 = v-10
v = 20+10
v = 30m/s
Hence the velocity of the body after 10s is 30m/s
 
        
             
        
        
        
Anwser 
It decreases The factor of two. 
Step by step explanation 
If she spin at a angular speed of 2w, and an initial speed of fi, when she slows down she is only has a angular speed of W, meaning that decreased 2
PS the anwser above me is wrong because in the question it said she decree so I couldn’t have stayed the same.
Hope this helps!