Question

A car starts from rest and accelerates at 10 meters per second squared. How far does it travel in 2 seconds?

Answer 1

The velocity of the car in 2 seconds is

$$v=at=10\cdot2=20\text{ m/s}.$$

Indeed, acceleration of 10 m/s² means that the velocity increases for 10 m/s every second. Therefore, after the first second of such accelerated motion the velocity is 10 m/s, after the second second it is 20 m/s, after the third one it is 30 m/s.