Answer:
vf=8.6 m/s
Explanation:
Given that
Initial speed u = 7 m/s
acceleration ,a= 0.8 m/s²
time interval ,t= 2 s
The final speed =v
We know
v = u + a t
vf=final speed
u=initial speed
a= acceleration
t=time
Now by putting the values
vf= 7 + 0.8 x 2 m/s
vf= 7 + 1.6 m/s
vf=8.6 m/s
Therefore the final speed vf = 8.6 m/s.
