A car going at 30 m/s undergoes an acceleration of 2m/s squared for 4 seconds. What is it's final speed? How far did it travel while it was accelerating?

Answer 1

V(t) = Vo + a*t
X(t) = Vo*t + (1/2)a*t^2

Learn them and use them.
t = 4. Vo = 30 m/s a = 2 m/s^2

BTW, drop the apostrophe in it's.

Answer 2

2 m/s^2=?-30m/s^2/4s
?-30=4*2
?-30=8
?=8+30=38
1st speed=38m/s

Answer 3

A certain airplane has an acceleration of 15.0 m/s2
How fast will it be moving2.5s after it starts down runway
How far down runway during the 2.5s

Answer 4

The first speed is 38m/s