What speed does the car acquire after 20 seconds, moving with an acceleration of 0.4 m / s ^ 2

What speed does the car acquire after 20 seconds, moving with an acceleration of 0.4 m / s ^ 2 if the initial speed is 2 m / s.

We know well from the school physics curriculum that the final speed with uniformly accelerated motion can be calculated using the following formula:

vfin = vstart + a * t, where a is the acceleration, and t is, respectively, the time of movement with the specified acceleration.

Let’s find out what value the speed will equal after the given car moved with an acceleration of 0.4 m / s2, if it is known that its initial speed was 2 m / s:

vfin = 2 + 0.4 * 20 = 2 + 8 = 10.

Answer: vfin = 10 m / s.