A car traveling at + 7.0 m/s accelerates at the rate of + 0.80 m/s2 for an interval of 2.0 s. Find vf.

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.